We have a couple of solid holy paladins, so unless we’re on a 3 tank fight, I’ve been spending a lot of time raid bubbling. I actually enjoy this, quite a bit, and it’s not something we can actually be well suited for.
How so? Well, it does require being alert and familiar with fights, but you’re essentially a “fire fighter”. Tank healer spiked on Marrowgar? I take over until they’re free. Someone important Marked on Saurfang? I focus on them. Good knowledge of the fight plus a mod like DBM will usually tell you when and where there’s someone who might need help.
In general, though, I keep a careful eye on my raid frames. I watch for red aggro outlines where they shouldn’t be. For the dogs, I make sure the bubble and penance the current tank after decimate. I watch for unfortuante or reckless DPS who have gotten themselves almost killed-a penance has saved more people than I can count. I pick my favorite caster and giving them Power Infusion every time it’s up. I save Pain Suppression for those “oh no” tanking moments. Typically I throw this on Zoja just as he pops Shield Wall, causing him to complain about the waste of cooldowns. What can I say, we’ve honed similar instincts over the years together.
You definitely need to function as a single target healer assisting the raid, isntead of trying to be a half assed holy priest. PoH is barely a blip on my recount. Lots of bubbles, lots of flashes.
All in all, I enjoy raid healing as a disc priest because it I have to be constantly on my toes!