10 man guild, we've tried 2 and 3 healing it. 2 Healing goes better, best attempt 14% Final Phase with MW/Disc. We have MW monk, D.Priest, R.Shaman in terms of healers to choose from, and we've tried different combos. We just don't have the healing to get through the third or so whirling Corruption with everything else going on. We have an ele shaman using HTT / AG, feral tranq, 2 devotion auras and still we seem to be falling short.
Our General strat.
P1. No prob, use hero on pull. Generally ignore adds except shaman, use Iron Star to kill
P2, don't kill weapons. Desecrate down, run to melee for MC, out for WC/Desecrate. Repeat. Once he gets his whirling empowered (after 2nd time in realm) we just loosely spread and people pick up their add and kill it. This generally leads us to be all over the place for the incoming desecrate / MC though. Maybe we just need to kill them faster?
P3, Continue p2 strat essentially.
I was thinking maybe using hero during the second phase in order to not get as many E.WCs, but still have to deal with the ones in p3.