Well we have 7 healers (including 2 smiters), 4 tanks and managed to kill him in ~5:30; with one healer more we always got into enrage.
We killed whelps, storm, time, but not 4 drakes - So I think our dps just totally sucks :/
Short question: Does Curse of Tongues work on Halfus?
Put in a few attempts (about 30 minutes) in last night in 10 man using 3 tanks and 4 heals (one being a smite spamming disc priest), and it was feeling really smooth and easy. Only issues we were having were from missing interrupts during the first tank swap, which we were getting down pretty well toward the end. Whelps were dying around 1 minute in, with the other drakes all sitting between 70-80% health (demo lock + fire mage spreading dots ftw). The way I figure it, if we can down all the drakes by 4 minutes in, we should be able to burn the last 65% of his health in 2 minutes no prob.