Had tanks needlessly dying in p1, and you had a tank tanking breaks.
Get a DPS to tank breaks (Ret pala with righteous fury / DK in blood presence / fury\arms warrior in defense stance) and have 1 tank tank feud, then the other tank tanks the next feud, then the feud after that the original tank tanks feud, etc. in order to avoid a tank having breaks at the start of a new feud. Also tank during feud can stay out of the raid group for the first caustic to avoid getting an extra hit to make gibbing less probable (double attack and caustic slime hit at the same time always) then runs in to the raid group after that.
Holy paladins should be using righteous fury to get threat so they tank chimaeron (better than a dps tanking) during <20% phase.
Pretty sloppy kill IMO, was most likely brute-forced and saved by the slew of battle resses.