This is a follow-up to my previous post on the subject, to look in a bit more detail at actual, not just potential, returns from From Darkness, Comes Light.
As of 1st July 2012 I’ve merged the corrections and the discussion on the various options from here into the previous post to keep it all in one place. The big change is that the recent buff to Mindbender with Build 15799 (1.0% per swing -> 1.3%) it’s a stronger choice now and competitive with the others, although still probably not an automatic go-to since PW:Solace and FD,CL have greater potential.
FD,CL Procs and Regen
In my initial comparison of FD,CL procs I chose to simply treat them as occurring on 15% of casts, and thus attributing 15% of the mana saving (19,500 mana) to each eligible heal.
That’s fine in spreadsheets and for simplifying the analysis, but how can we quantify the randomness? One way is to simulate a lot of encounters and see what sort of range we might expect.
Considering a 5-minute fight, and two usage scenarios, here’s what I get from an arbitrary run of the sim (10,000 iterations):
Bare minimum – 2 casts per minute – Mean saving per fight: 29,253 mana – StdDev: 22,456 mana.
Tank-healing heavy – 20 casts per minute – Mean saving per fight: 295,563 mana – StdDev: 70,406 mana.
The standard deviation (StdDev) is a measure of the size of the variation from the average, and that’s the important figure here. The more statistically-minded will already have drawn their own conclusions, but for the rest of us the short version is this:
If you’re casting FD,CL-eligible heals infrequently you might get lucky and nearly double your returns but you’re just as likely to end up with practically nothing. If you cast frequently you’re better off, but you could still end up losing out on a quarter of the returns you were expecting.
Obviously over a longer fight the numbers will even out a little better, but the majority of the fights do fall into the ~5-6 minute range, at least in Cataclysm.
The point of all this is that because of the huge variations of FD,CL’s procs you really need to be casting a lot of eligible heals to be sure of getting the benefit. When comparing PW:Solace and FD,CL, you should underestimate the value of FD,CL, particularly if running out of mana is likely to be a killer rather than an inconvenience. PW:Solace gives you flexibility that FD,CL does not.
Again, this doesn’t change the conclusion that PW:Solace is better for raid healing and FD,CL only if you’re tank- or single-target-healing a lot, but it does shine light on the massive unreliability you can expect to see in FD,CL returns.
Updated 24th June, see the follow-up post for details. Updated again 1st July, to take account of the 1.0% -> 1.3% bump in Mindbender’s mana return. This changes the conclusions a little: originally Mindbender was barely an advantage over Shadowfiend, now it is a viable option.
For another take on this, Derevka at Tales of a Priest has carried out a similar analysis including presenting the data in some slightly different ways. That’s well worth a read as well; more eyes and more opinions are of course always a good thing for the community, as are different ways of explaining and presenting things.
It Depends
Obviously it’s going to be situational, there’s no question about that. Each of the talents has a different focus and will help in different scenarios:
From Darkness, Comes Light – Gives you a 15% chance on casting a Smite, Heal, Flash Heal, Binding Heal or Greater Heal to get a free, instant-cast Flash Heal. You can store up to 2 free heals.
Mindbender – Replaces Shadowfiend with a Mindbender. With Mindbender you get 1.3% Mana per swing instead of 3%, but a 1 minute CD instead of 3 minutes. You also get an extra two swings from the Mindbender because it has a 15s duration compared to the Shadowfiend’s 12s. The Mindbender’s damage is around 5.5k per swing (for me at level 88) compared to around 6.5k for the Shadowfiend.
Power Word: Solace – New! Deals light damage to an enemy, but grants 2% of mana back per cast. Priestly Telluric Currents, if you will. (Currently this restores mana even against immune enemies or if you miss, which is convenient).
First I’ll look at Mindbender and compare it to the other two options, then discuss the comparison of FD,CL with PW:Solace. If you just want the short version, then skip to the conclusions.
Mindbender
The graphs below show the amount of mana returned for Mindbender compared to Shadowfiend for a range of fight durations from 3 to 12 minutes. Because Mindbender replaces Shadowfiend, this is the net benefit of taking the talent.
The first shows the best-case situation, where you cast Shadowfiend or Mindbender pretty much on the pull and none of the mana returned is wasted. At level 90 this is consistent with chain-casting anything but Heal. This also assumes a 15% miss chance (healers are likely to have no hit bonus, and 15% is the standard chance to miss a boss-level mob).
Mindbender and Shadowfiend mana returns for a range of fight durations (Level 90, Immediate first cast)
Under this scenario Mindbender generates additional mana, both because of the extra swings and higher mana per swing, and because of the greater granularity (so you can fit more casts in.
If you don’t need the mana in the very early stages of the fight and delay the first casts of both until you’ve opened up a suitable mana deficit, the effect is more pronounced. The second graph shows the effect if you choose to delay Shadowfiend for a minute after the pull compared with waiting 20 seconds to cast Mindbender (in both cases the delay is sufficient to let a sufficient mana deficit build up, even being fairly frugal with mana).
Mindbender and Shadowfiend mana returns for a range of fight durations (Level 90, Delayed first cast)
In this case the greater granularity of Mindbender lets you fit an extra cast in much earlier, opening up a slightly larger gap over most fight durations.
However, remember that the benefit of Mindbender is the difference between Mindbender and Shadowfiend. So the possible advantage of Mindbender over Shadowfiend needs to be weighed against the potential benefit of the other two talents.
Looking at the graphs the gap widens and narrows as the encounter duration changes. For a 12-minute fight the gap is the largest, at 162,180 mana. To compare that to the other talents, consider that PW:Solace gives 2%, or 6,000 mana, per cast. So Mindbender equivalent to 162,180/6,000= 27.03 PW:Solace casts over the course of the fight, which is 2.25 PW:Solace casts per minute over 12 minutes. So if you can squeeze in just over 2 PW:Solace casts per minute, PW:Solace beats Mindbender. Since 2 FD,CL-eligible heals are worth roughly 1 PW:Solace cast, double those figures to see how Mindbender compares to FD,CL.
Let’s look at how the gap looks over the same range of fight durations as before:
Advantage of Mindbender over Shadowfiend, expressed as PW:Solace Casts per Minute
The dotted line is where things used to be at 1%, and the solid line is the current state, including the buff to 1.3%.
While there is a lot of variation depending on the fight length, the range is generally between 1 and 3 PW:Solace casts needed to break even, and typically comes out around 2, on average.
The bottom line is this: if you can cast at least 3 PW:Solaces per minute of the fight then Mindbender is simply the weaker choice. If you’re not sure, check the chart and consider the likely fight length, and decide whether you think you can hit the target number instead.
Mindbender does have other advantages to be aware of though that could change the equation in specific cases:
If your Shadowfiend is likely to get killed, the Mindbender gives you more bites at the cherry. 2/3 of the mana if one Mindbender dies is better than 0/3 if you lose the Shadowfiend. But this shouldn’t be a huge problem. More importantly;
Mindbender is very much fire-and-forget. When the button lights up you just cast and get a nice mana income. No fuss, no bother. Usually encounters aren’t non-stop from start to finish, but if you find yourself really struggling then MB isn’t a bad option
The Mindbender does a lot more damage over the course of the fight. Each SF cast is good for about (depending on crits and misses etc, of course) around 50,000 damage; Each Mindbender cast also accounts for around 50,000 damage but you get 3 Mindbenders to every Shadowfiend, so you’re comparing 50,000 to 150,000. When DPS counts, Mindbender gives an advantage, albeit a small one.
FD,CL vs Power Word: Solace
Power Word: Solace
If you’re not casting single-target heals very often, the choice becomes simpler because you’re not going to see the benefits of FD,CL. But if you’re doing a bit of both, how do you decide?
Let’s get a feel for the numbers first.
Assuming no internal cooldown, FD,CL has a 15% chance to proc from one of the named heals. We can (very roughly) say that each eligible cast you make is worth 15% of the mana cost of Flash Heal, or 2925 mana at level 90.
PW:Solace is worth 2% of your mana per cast, or 6000 mana at level 90.
With those numbers in mind, have a look at your logs or just make an educated estimate of how many times you’re casting an eligible heal in a fight. Divide that by 2 and that’s how many PW:Solace casts you’ll need to squeeze in to come out ahead.
Remember that Evangelism procs from Penance in MoP, so if you’re heavily raid healing then you may not need to cast Smite at all. This means that FD,CL is not an automatic choice for Discipline even if we’re using Archangel liberally.
As a general rule of thumb to get started, if I were going to be primarily raid-healing I’d lean towards PW:Solace to begin with, while if I knew the tank might need more attention on a given encounter I might try FD,CL as my first pick. But the key to maximising this is actually reflecting on your healing style and the number of PW:Solace opportunities in a given encounter and making an informed decision.
Conclusions
For tank healing FD,CL looks like the strongest choice. If you’re able to cast more than 6 FD,CL-eligible heals per minute (and you should be if you’re healing the tank) then FD,CL beats Mindbender. Deciding between FD,CL and PW:Solace is trickier, but bear in mind that you need to fit in at least 1 PW:Solace for every FD,CL-eligible heal you cast. If you’re throwing a stream of Heals and Greater Heals (with PW:S, Penance, PoM and Smite/HF woven in) at your tank then you’re looking at somewhere on the order of 10 PW:Solace casts per minute to break even.
For raid healing PW:Solace should be your first choice. To guarantee to beat Mindbender you need to fit in 3 Power Word: Solace casts per minute on average, but you can often come out ahead with just 2 PW:Solaces per minute.
However, if you’re finding yourself in a ‘floater’ role and you find that you’re casting more than twice as many FD,CL-eligible heals (Heal, Greater Heal, Binding Heal, Flash Heal and Smite) PW:Solace casts, then you might see a greater benefit from picking FD,CL. I’d recommend starting off with PW:Solace and looking for as many opportunities to cast it as possible, and then checking your logs and seeing what’s most appropriate for your playstyle.
Remember that PW:Solace has the most potential if you can find and take the maximum number of opportunities and cast it as often as possible.
Mindbender is valuable for non-stop raid-healing when you aren’t going to benefit from FD,CL but also can’t squeeze in enough PW:Solace casts. Its fire-and-forget nature leaves you free to get back to what you’re doing without much thought and management.
I’ve spent a bit of time in the last week or two playing my Discipline Priest in the Mists of Pandaria beta, and trying to figure out what’s changed and what’s what in the new world order. Of course, this being Beta, it’ll all have changed again next week, so treat this as a snapshot of where things are at. (I actually delayed publishing this until I had time to see the new Spirit Shell changes, more on that below!)
Bear in mind that I’m still only level 86 as I write this, and the experience changes a lot as you level up.
The Gotcha Test
The first thing I do when I log into a beta or PTR is what I think of as the “Gotcha!” test. I take a close look at the HPS, HPM and costs of all our spells. Why? Remember Flash Heal in Wrath? And in Cataclysm? That’s what I’m looking for, a go-to ability that’s undergone a drastic shift. Here’s the list at level 85, at my gear level which is ilvl 404 on Live:
Priest Spells, Costs and Performance (Build 15677)
Notice that the mana costs are all nice neat round numbers. That’s because all healers now have a fixed mana pool of 100,000 MP (except gnomes, who have 105,000 MP thanks to our racial!) and spells cost a fixed percentage of our maximum mana.
No huge surprises in there this time, so I won’t go into too much detail. Most of the spells are where they have been in Cataclysm, which is nice. Flash Heal and Power Word: Shield remain our fast, expensive emergency heals. They have pretty punishing HPM and high costs, but they’re quick. Penance is still earning its cooldown with comparable HPS to Flash Heal but half the mana cost, and Prayer of Healing is still good when you have 3 or more people to heal up.
On the subject of abilities, there’s a new page on the spellbook labelled Core Abilities:
Priest Core Abilities Tab (Build 15677)
This is a helpful little nugget to nudge new players in the right direction when picking up a spec for the first time, or returning to a spec after a while away. It might be nice to draw attention to this tab more obviously, maybe as a tutorial tip, because it’s not even in the Talents window so you could easily overlook it.
Spirit Shell
While for a while Spirit Shell was an absorb replacement for Greater Heal, that design was rolled back in a recent build in favour of giving us GH back and redesigning Spirit Shell. Personally, I like what they’ve done with the spell.
Spirit Shell is a 15s self-buff on a 1 minute cooldown that turns all the heals you cast into absorbs with their own 15s duration. According to Ghostcrawler it’s been designed to take account of Divine Aegis (by increasing the size of the bubble by your crit chance so if, for example, you have 20% crit chance your bubble will be 120% of the size of the heal), the bubble size benefits from Grace in the same way the original heals would, and the bubbles also scale with Mastery. Note that the bubbles don’t “crit”, your crit chance has already been taken into account.
To put some numbers on this, imagine you hit Spirit Shell, then cast Greater Heal on your tank. Suppose, for the sake of argument, a baseline Greater Heal is good for 50,000 HP.
I have 15% crit chance, so that gives me a bubble of 50,000 * 1.15 = 57,500 HP.
I also have 25.73% stronger bubbles from Mastery, which takes my bubble up to 57,500 * 1.2573 = 72,295 HP.
Add in a triple-stacked Grace for a 30% boost, and my Greater Heal bubble is up to a whopping 72,295 * 1.30 = 93,983 HP.
That’s good stuff!
The current implementation is still a little early. Currently it’s not actually benefiting from any of those extra effects so we’re stuck with the basic heal. There’s also the open question, which Ghostcrawler acknowledged is still one they don’t have an answer for, of how stacking and capping these bubbles will work. Currently the Spirit Shell shields from different heals stack with each other (they create separate buffs for themselves depending on the spell) but casting the same spell twice refreshes the duration but replaces the absorb amount with the latest value, even if it’s lower.
I expect both of these behaviours to change and I wouldn’t be surprised to see the effect end up working more like DA does, where all the heals contribute to a single bubble buff which stacks up to a cap. The developers did point out that they don’t like us feeling like we need to spam something up to a cap (PoH/DA, anyone?), but I don’t think I mind that sort of mechanic. We’ll have to see how it plays out.
The utility of this is centred around preparing for and preventing damage. Know the Elementium Bolt is about to splash down, or your tank’s going to get Impaled? Get those bubbles out there to take the edge off it. The fact that it scales with Mastery means that you’ll get a slight healing boost out of this cooldown as well (Mastery affects the whole bubble, rather than just the DA portion of the heal), but the tradeoff if that you’ll have to have enough damage coming out to take proper advantage of the absorbs.
Rapture
Rapture is something of a vexedsubject at the moment.
Rapture, on Beta and on Live, returns a lump of mana when your PW:S breaks; on Live it’s a fraction of your total mana, on the Beta it’s 150% of your Spirit. On Live this is (significantly) more than the PW:S cost to cast, making it an important source of mana regeneration, whereas on Beta the return is less than the cost of PW:S.
If we consider Rapture as a regeneration mechanic, it’s a slightly problematic one. The objections been gone over several times, including in the links above, but they more or less come down to difficulties in getting PW:S to break reliably when the damage is light or unpredictable or cases where you have multiple Disc Priests fighting over opportunities to bubble a single tank.
This unreliability is a problem on Live because Rapture is a form of “active mana regeneration”, like a potion on a 12s cooldown, and it’s a major part of our mana equation – we cast a bubble every 12 seconds to give us the mana we need to do whatever it is we actually want to be doing – and because it’s so powerful we don’t bother with Spirit for the most part. Imagine if your Shadowfiend had a 50% miss chance, or your Hymn of Hope didn’t actually give you any mana back half the time. Oh, wait…
Rapture isn’t trying to be Telluric Currents. You shouldn’t spam PW:Shield when you need mana. Rapture is intended to offset the cost of PW:Shield when the latter is used intelligently.
So instead of thinking of Rapture as part of our mana regeneration, instead we should think of it as a discount on casting PW:S as long as we don’t do it too often and pick a target that’s actually going to take damage. Think of it as a proc like Surge of Light, giving us a cheap PW:S every now and then instead of a free Flash Heal, only it doesn’t proc randomly but activates every 12 seconds instead. I still think there’s a possible issue with PW:S needing to break, especially in the case where you have two Disc Priests fighting over the damage, but you can at least see why that design is there, and that might be an application of the Divine Insight talent (call-ahead!).
Have a look back at the table, and look at the HPS and HPM of PW:S with and without Rapture. Without Rapture it’s still our best HPS ability, but the cost is punishing. Factor in a Rapture proc though and it’s suddenly right up there with our best HPM abilities as well.
There’s still one small wrinkle though, and that’s Meditation. You see, Meditation for Disc Priests is 25%, whereas it’s 50% for every other healing spec. The reason for this is that because Rapture makes PW:S so cheap and so powerful (when we weave it in) we can achieve the same output as the other specs for a smaller mana cost. To balance out this lower cost, our background regen is lowered to match.
The upshot is that if we don’t use PW:S at all, or don’t use it especially intelligently, we’ll end up a little behind the other specs mana-wise. If we use it exceptionally well, we’ll potentially end up ahead. Now the ball’s in Blizzard’s court, and they’ll need to tweak the numbers as the Beta progresses and we hit the level 90 content to make sure we’re balanced.
Talents
I’ve not done a talent run-down in a while, so let’s see where we’re at with those.
Level 15
Priest Level 15 Talents (Build 15677)
Level 15 remains the “CC” tier. Void Tendrils summons a Tendril for every mob within 8 yards of you that roots it for up to 20 seconds; Psyfiend lets you spawn a Psyfiend at a location you choose that fears a mob attacking you every 1.5s; Dominate Mind is Mind Control. Videos of the first two are below for your enjoyment.
Void Tendrils:
Psyfiend:
Personally I’d go with Void Tendrils as my standard pick, just because fear is often a risky proposition. But I can see a lot of value in the Psyfiend in PvP. Throw it down on a flag or into a tower and watch the fun, or maybe just use it to keep people off you.
Level 30
Priest Level 30 Talents (Build 15677)
At Level 30 you’ve got the movement talents. Body and Soul is the same ability we’ve known and envied for two expansions, only now it’s available to all Priests regardless of spec. The contender for PvE is Angelic Feather, which lets you place up to 3 feathers on the ground that grant a movement speed boost to the next person to step on them. If you have a known kite patch or need to keep someone moving at speed for a while then Angelic Feather is stronger than Body and Soul, but Body and Soul is more flexible if you just need to get someone moving and don’t necessarily know who it’s going to be. Tailor your choice to the situaion.
Phantasm looks at first glance like more of a PvP choice, although don’t rule it out entirely for PvE either. It makes your Fade remove all movement-impairing effects and makes you untargetable by ranged attacks and immune to movement-impairing effects for 3 seconds. The untargetability might have niche applications (I wonder if it would make you immune to Shrapnel, for example) but the freedom of movement could be handier.
I suspect the choice will usually be between Angelic Feather and Body and Soul for PvE, but it’s nice to have the option of Phantasm as well.
Level 45
Priest Level 45 Talents (Build 15677)
Level 45 is the first tier where you get to actually improve your output. From Darkness, Comes Light (FD,CL), which still has that extraneous and slightly grating comma, gives you a 15% chance to proc a free, instant Flash Heal when you use (most of) your single-target heals. The list includes Smite, but not Penance or Holy Fire; this may change, I’d certainly expect to see Penance in that list. Given the high HPS of Flash Heal, this is a strong talent if you’re using a good number of single-target heals.
Mindbender replaces your Shadowfiend and deals double the damage and gives back double the mana. Because everything scales off base mana and base mana is fixed, your Mindbender will return 72% of your mana bar (assuming he doesn’t miss) compared to 36% for the Shadowfiend. This extra mana allows you to use more of the expensive spells, and is a great choice if you don’t think you’ll see the benefit of FD,CL, if you’re AoE healing, for example.
And finally we have Archangel, another old friends that’s been opened up to all three specs. This is a straight up output boost for 18s on a 30s cooldown, assuming you’re able to weave in the requisite number of Smites, Holy Fires and Penances to stack Evangelism up to 5. That’s right: Penance stacks Evangelism now, one stack per tick, and causes Atonement heals as well, so you shouldn’t have any trouble getting Evangelism stacked.
In this tier you’re picking what you need. The first two are all about efficiency, the third is about simple output. I suspect we’ll shift from the left to the right as the expansion progresses and mana becomes less of an issue, and at the start we’ll be interested mostly in FD,CL for tank healing and Mindbender for raid healing, although I’ll admit I’ve not sat down and worked through them in detail yet.
Level 60
Priest Level 60 Talents (Build 15677)
Level 60 is all about taking care of yourself. You get a choice of an instant 30% self-heal on a 2-minute cooldown (Desperate Prayer), a shield for 20% of your HP when you’re damaged below 30% of your health every 90s (Angelic Bulwark) and the new Spectral Guise.
Spectral Guise is an interesting talent. When you hit it you spawn a clone of yourself which your enemies will attack, while you get stealthed for 6 seconds or until your clone (“your true form”) is hit 3 times. You can either use the time to run away or to throw a couple of heals on yourself unimpeded.
Spectral Guise feels more solo- or PvP-orientated than the other two since you don’t often take direct attacks as a healer in raids, but it may be useful to save you from a powerful attack directed your way (again Shrapnel comes to mind), since you don’t share in the the damage your clone takes.
Level 75
Priest Level 75 Talents (Build 15677)
Here’s where things get really weird, with a jumble of talents. Twist of Fate gives you a 15% damage or healing buff after damaging or healing a target under 20% HP. I can see this possible being useful for handling low-health enrage phases: throw a HF on the boss at 19% and enjoy 15% extra healing for a while, as well as the more orthodox behaviour of rewarding triage-style healing of the lowest people when the raid is weakened.
Alternatively you could go for Power Infusion for 20% faster, 20% cheaper spell for 15s every 2 minutes either for you or for a friend.
The real wildcard is Divine Insight. For Disc Priests this procs from Penance casts and allows your next PW:S to ignore and to not cause Weakened Soul.
I can see two main uses for this. It’d be pretty handy if you needed a quick throughput boost on a single target because it would let you to throw out a PW:S, Penance, PW:S combination, and it would also be useful to let you maximise the frequency of your Rapture-cheapened PW:S casts even if you or another Priest has already got Weakened Soul on your target.
Level 90
Priest Level 90 Talents (Build 15677)
Until we’re able to actually play with these all we can do is speculate. I’ll link the three options, but reserve comment until they’re opened up on the Beta.
Since the Prime Glyphs have been removed, we’re left with the utility-focused Major Glyphs and the cosmetic Minor Glyphs.
The minors are all more or less unchanged. Shadow Protection went away with the removal of spell resistances, and we got Glyph of the Heavens instead. This one makes your Levitate targets appear to be floating on a cloud. Funky!
As for Majors, a lot are unchanged, but there are a few interesting changes.
Glyph of Dispel Magic – Deals damage when you dispel an enemy, rather than healing when you dispel a friendly.
Glyph of Purify – Heals 3% of max HP when you dispel a friendly. Dispel Magic is now our offensive dispel, while Purify is our defensive dispel/cleanse ability.
Glyph of Fade – Reduces all damage taken by 10% when you Fade, which could be mighty handy.
Glyph of Holy Fire – Makes Holy Fire instant-cast. Doesn’t save you any time if you’re able to stand still, but could add a valuable extra tool to our healing-on-the-run toolkit.
Glyph of Levitate – Increases your movement speed by 10% while you’re levitating and for 10s afterwards.
Glyph of Penance – Allows you to cast Penance while moving, but increases the cost of Penance by 20%. If you need healing on the run this is a good bet. The cost just stops it from being a no-brainer.
Glyph of Power Word: Shield – Similar to the old version, but where the healing used to be a bonus, this time the healing is taken out of the absorb instead.
