So my guild just started working on the first boss heroic mode (10-man) and we were not able to survive the storm phase reliably, most of the time half of the raid would die. The main part of our issue is of course bad with ball dodging - that we will keep practicing, but I'm hoping to get some help with the healing as well. I read several guides and many forum posts (here and other websites), so I thought we had the right idea, i.e. (1) assign healing CD's for each phase (2) myself as a disc priest put up spirit shell ahead of each storm.
In our attempts though, I noticed that
(1) my spirit shells got eaten away almost as soon as I put them up
(2) once the storm started, i could only manage to throw out PW:shields, mending, a few penance and cascade.
(3) the worst part: from the damage received summary, even when ppl were doing okay with ball dodging, they still slowly died to storm damage due to lack of healing.
So as a priest, what do you think i can do to be more effective? Specifically
i) are you able to put up spirit shells that will last a few more seconds into the storm? any tip for the timing?
ii) in the middle of storm, what do you usually do? (i read a certain strat where everyone group up near the statue and move every few seconds, to allow easier heals. any other ideas?)
iii) is holy better for this fight? i've played disc all the time, but this fight got me thinking maybe the burst healing from holy is more useful for this boss?
p.s. our healing team is disc + hpally + shaman