Originally Posted by
anon5123
That's the best possible scenario. You WANT to be oom right at the end of the fight, because if you're not oom, that means there was more healing that you could have done.
Disc however, you have to play it like an arcane mage: only go full ham at specific times, and ease up the rest of the time. It's really awkward and counter-intuitive compared to other healers, and past expansions where you wanted to always be casting.
When there's little damage going out, you just use PWS on cooldown, maybe a couple Pleas to keep 2-5 Atonements out, and hit up some Smite. If only the tank is taking damage, just don't cast at all to conserve mana (only if you're below 90% mana)
As Disc, you have to know beforehand when the big raid damage is coming, and about 6-8 seconds before, you throw out some more Plea's and maybe a PWR or two, then use Mindbender or Light's Wrath, and Penance/Smite for the next few GCDs. This is what Disc excels at: burst healing predictable raidwide damage.
If you try to heal everyone all the time, you're going to OOM very fast because Disc is not suited for spot healing like other healers are.
Yeeaaahh, that's a bit too much. If you're casting PWR 4 times for every raidwide damage, then it's no surprise that you're OOM'ing so quick.
You want to hit Plea/PWS until about 6 Atonements, then PWR twice, leading to 12 atonements. You can't be trying to heal the entire raid every single time, because if you do, you'll burn your mana bar with all those PWRs.
Oh, and don't use Plea if you have more than 6 Atonements out, because it starts getting really fucking expensive. At that point, it's much more mana-efficient to use PWS, or Shadowmend if the target is below 70% or so.