by Colezz » Mon Jun 29, 2015 6:42 am
It was bugged the same when I did it. What u gotta do is have someone pull him and run far away till he stops aggro ing, meanwhile u sit at cave entrance and wait for him to return. For some reason when he resets after being pulled too far his aura disappears so u must tag him like the split second he returns before his aura comes up again, since he will just evade if u attack while he he's moving on his way back.
Hope this helped