Just burn down/CC the casters in the groups that heal and cast the spell reflecting bubbles on the big guys and watch your AoE spells. When I run this on my Rogue I noticed that my AoEs would be reflected back at me if we didn't burn them down fast enough or the mages in the groups didn't SpellSteal it from them. Just keep on the move to stay out of the harmful pools on the grounds and swap leaders on the squid bossfight, or avoid it all together now. I've had gear drop off that boss that claims it only drops from the others, even according to the dungeon guide they added to the game. Not sure if it was a glitch or not, but if you're not after the quest, he can be avoided. As for the last boss, if you've got a Priest in the group, have'em Mind Sear the big guy in the middle to burn down the little adds, then rush to the bigger ones. As for the second phase there where you have to burn down the 3 channelers and have the tank kite the others, turn off /follow and send the dps to the 3 and kite the others around on one side of the room. See if that works out. The rage buff the water elementals give themselfs can be dispelled/stolen on both normal and heroic as well.