Obligatory World of Logs links for last night's attempts (I am the pally tank):
We seem to struggle with the blue head's ice beams, so most of the attempts we were only killing Red and Green heads. We tried with 3 heals and 4 heals, alternating healers out, we just couldn't down it. We can pretty consistently get to the 6th head, it seems like the final Rampage transition is what gets us, healers always run out of mana during Rampage or immediately after and then it's a wipe. We had 2 attempts where we got the 7th head to ~50% but I'm not sure how we're going to down this boss. Any ideas or suggestions would be much appreciated.