Did it last night with r-druid (me) and holy paladin. Holy paladin on tanks with HL glyph Resto druid on raid The hardest part is keeping everyone low enough and still have time to switftmend and throw nourishes on those with biting cold. We usually lust at around 31% and when the lust is over our ele shaman throws some assist heals. (last 10-15% usually)
Armory
As healing debuffs works on Anub in this fight its better to heal way to much _IF_ you got mortal strike or aimed shot at him. I even popped tranquility last run to get everyone high in health (anub was at 5% then) just to get the insanity chest.