I prefer holy, i just hot up my tank with renew, PW:S and PoM, and for nearly all heroics thats all I need, unless i start pulling more. Then i just toss a few flash heals or greater heals, and im good. AoE healing is insanely easy... for Brohnjam i just spammed the big aoe heal, and watched my whole team go from 50% to full over and over. I've been meaning to try Disc, but haven't felt the urge. At least the gear is the same.