I suppose there is no more a fitting end than death by slime for my slime wizard. The big beelzebub boss motherfucker wasn't even the problem.
Word of Chaos+Chaos Casting is a pretty nice combo since it just lets me nuke and stun the entire screen several times. Must've used it like 6 times here, with echoing chaos making it 12. Most likely could've cleared this level too, had I used it more sparingly.