Your video helped me greatly. Knocking that boss down was a very fast way to "dispose" of her. I also used a tactic of (with camera unloced to spin 360 degrees) of keeping summoned elementals blocking the door so I could just get rid of the leader. Then I slowly let one of the monsters in that room where it ended up dieing.
Why can't they just die quietly? Gotta go out hollering and screaming. If they would just have kneeled down and let me lop of their heads it would have gone by quicker...