Herald Volazj seems to remain targetable if you have a DK in party, its some kind of bug. I could not make this happen with m y prot paladin so I got a DPS dk in my guild to come help (replaced prot pal with him)and we burned him to like 19% on the first insanity, he poofed to me but the DK could still hit him and he basically solo'd the liast 15% or so and killed it while I was fighting my images. Had I known he could target it I i magine I could have just assisted him and helped to finish the boss but I didnt even realize it till he died because I can actually kill 1 insanity phase in the timer... but didn't have to lol. Just 3 occulus achievements left and I'm all done on my alts! ( make it count, amber void, exp drake rider ).