This boss bugs out on some runs. One of his AoE's is caving in the area and the rocks stack on top of people and you can't revive them. He power attacked me earlier it literally threw me through a wall and I was in the tunnel thats not accessible until after he is dead. He also gets stuck doing an AoE over and over until the entire party is dead. The majority of boss mechanics are predictable after beating them. AoE, attack, attack, power attack, ads, repeat. But this one is definitely glitching. When he isn't then he is fairly easy to take down but that was just ridiculous. He also doesn't respond to aggro. I have inner fire and puncture slotted and neither one was even getting him to look my way.