what is that? you were out of imagination? well next time dont be bothered just put a single monster each stage
Low lvl players can't win that ... why you mad?
That was probably a glitch. There were likely supposed to be multiple cloud monsters and cthulus. I'm sure by level 119, you'll be happy you're not dealing with more than one each.
Having just finished level 19 with these two, I can attest that they're hard enough as is.