So while I was just running around the map for a while, I ran into a particular fight, and it seems like (while it should be a super easy fight; I'm well beyond equipped for it) the boss just won't die? I used Psychopath on it, and it showed a blue "0" after I hit it for a while, and say that it had 60,000 HP. I continued wailing on it, but nothing ever changed. At this point I think I've managed at least 300k damage, and I'm nowhere near dying to it, but it won't die.