Ok I found a way to kill this guy. I put /castsequence Icebound Fortitude, Anti-magic Shell on all my guys and then I used Army of the Dead before he came out of his prison. Once I engaged him I waited for the spawns to happen, while dpsing boss, once there were two adds up I hit IBF. When that wore off I hit again for the AMS. Of course my druid died, but my guys needed no heals and we downed the boss with no problem. I even was able to kill cyanigosa after wasting my Army of the Undead on second boss. She actually isnt that bad once you figure out how to position, etc.