Idol popped little after killing Fabled Avatar of War, wich was non slowable with Chanter slow. Took like 10 min. to kill with lowish dps.
85 Chanter, 85 Druid, 66 Pally, with Tank j5, healer j5 and melee dps a5 merc.
Idol slowable after a a couple tries, but Healer merc 9 mana, 5 res, 5-5 healing aa's went oom after 3 min. resisted all but Horde of the hive, tash and slow, so bailed out.
This is definetly quite harder than the Avatar to kill