"The Exterminator" ak'ab burrowsFor lack of quest or bug forums:
The Exterminator stage where you destroy 2 ak'ab burrows is very difficult for melee. While the burrow was lit up and I was on all sides of it, it was out of range. While I was on top of it, it was out of range. While I fell inside the graphic I was out of range. The only thing that worked was spamming a PBAoE ability. That's as a Chaos/Hammer build. I've seen enough questions about this in game a thread needed to be made.