Hey,
I found a bug to easylie get a 100% kill on Irondocks last boss. We did it with a hunter in CM, other petclasses could be possible too. So what u wanna do is to Kill of his two adds asap, and then u get knocked back. u run the the barrles where u are not hit from his rockets, the last barrels in front of the boss. Then the hunter sends his pet to kill him. It took the Pet 10-15mins to kill the boss, the hunter also used murder of crows to do more dmg. The boss just stands there and fires his rockets and gets slowly killed by the hunterpet... no enrage, no flames from behind ...