My guild is currently working on Heroic Spine of Deathwing (25-man), and I had a question for you guys about healy priests and this encounter. Specifically, the question boils down to is it a matter of if you're a healing priest for Spine, go holy or go home?
For this fight we've tried a variety of healer set-ups. Our most common one has been 2 holy pallies, 1 disc priest, 1 resto shammy, 1 holy priest and 1 resto druid. We've tried trading 1 of those holy pallies for a resto shammy. Honestly, the results have always been more or less the same. SLT is a better raid CD than AM but I digress. I'm thinking that maybe we should sit our disc priest for this fight.
Our disc priest's throughput is a lot lower than the other healers' on this fight, so we assigned him to dispelling in light of this. However, last night I played with having our resto druid dispel instead and observed that it didn't affect his HPS all that much. I saw that even for the top ranking disc priests on WoL, their HPS is 6k below the next closest healer, so it's looking like it's an unfortunate function of being disc on H Spine.
I realize that disc has a lot of good utility (big shields, good single-target heals, mitigation CDs), but the question that I have for you guys is that is there anything that I may be overlooking? As it stands right now for us, even with those great utility stuff that disc provides, I feel like we'd gain more from having a holy priest or another type of raid healer in that spot that's capable of churning out ~10k HPS more on that fight.
What do you guys think and/or have experienced?
Edit: Unfortunately, unable to provide logs, as our guild's logs are private.