I've been playing on ultraviolence and sweet Jesus, they really took off the kid gloves with this expansion. It's like they don't even care if you are able to finish it or not. I just fought through a wave with four mancubi, four cyber mancubi, at least three arachnotrons, two titans, three prowlers, three hell knights, two barons of hell, three pinkies, more carcasses than I could count, and an endless horde of imps and soldiers with shields. And this was all with no checkpoints and an electrified floor. God damn. It must have taken me 20 tries.