I'm a pally healer, and I've never actually played a priest past 25, but I've been healing 10- and 25-man Naxx raids with a priest buddy in my guild. Most fights, he's past me on overall, but I'm on MT/OT healing, he's on raid and specialty stuff. I can understand. Usually I don't look at what he used, but I was wondering how much CoH he must be using on Sapph fights.
11%. Yes, 11% of his total healing out of his 2700 HPS was CoH on the Sapph fights I looked at. A whole 77% was Prayer of Mending. And most of the other times I checked out Recount, Greater Heal was above CoH.
I don't know if CoH needs a nerf or not, as I've never used it, and the one guy I know with it uses it less than his other heals. What I'd prefer is for Raids to do less AoE, and more constant damage to specific people. More Tank, offtank, random DoT damage.. Less <Elemental> Volley spam, Malygos Vortex, Frost Aura.
I hate Sapphiron, by the way. I could do with less fights where I need to raid heal..