This post title was one of the recent search terms that came up recently when looking through my site statistics. It’s actually a fairly good question, and something one might actually find as a fun encounter for a holy priest. This is, believe it or not, one of the few places you’ll see consistent use of Holy Nova. This is going to be a fairly short post, since there’s really not much to it. I’ll also assume that you’re familiar with the Occu’thar encounter and its mechanics (not that there are many of them).
First and foremost, contrary to most encounters, your Chakra state does not matter in this encounter. I’d actually be one to say that Chakra: Serenity or Chakra: Chastise will benefit the raid the most, for Holy Word: Serenity in the former, and for damage in the latter. Yes, you read that right, damage. The main two mechanics that you will need to watch for in this as a healer are Focus Fire (GTFO of ginormous puddles on the ground) and the adds. When stacking for adds, you’ll want to ensure that you’re spamming Holy Nova for this. Mind Sear is actually NOT preferable because the adds cause pushback, and your Power Word: Shield is not going to last through the entire duration of the adds phase. Moreover since it is susceptible to pushback, the mana cost is not worth it.
To this end, you’ll actually want to glyph for Holy Nova for the GCD reduction to get off as many Holy Novas as possible. Not only does this heal players taking damage from the adds, but it damages the adds, allowing your raid to spread out before the next Focus Fire coming immediately after the 10-second mark, and also making absolutely sure that your raid doesn’t die from adds exploding. Ideally, you’ll want to spread out at 8-9 seconds into this phase, so the Focus Fire lands on the grate in the middle (which you should otherwise not be standing on – have your raid spread out behind Occu’thar to the sides of the room).
The bulk of the rest of your healing is going to be PoH’s and CoH’s to top off people right after the adds phases, but otherwise, mostly single-target heals (tanks and people that get targeted for Focus Fire – they will get hit with at least one tick of this under most normal scenarios), which is why Chakra: Sanctuary isn’t as necessary, at least in 10-man. I ran Sanctuary originally because I wasn’t fully aware of the damage patterns. Some things to note, otherwise. Mana isn’t much of an issue in this encounter, but you’ll need to be aware of Focus Fire timers to ensure that you’re not getting a Hymn of Hope or Potion of Concentration interrupted. One or the other should be enough to get you through the encounter (even two-healing it), and if you’re spending time with single-target heals, you’re less likely to need them.