The boss is “immune” which means it doesn’t matter if you use fan men or slowing. It is immune to such effects. Better to have strong DPS units instead of decent slowing ones!
Bemmyblox I challenge you to upgrade all the money makers in toilet tower defense. But if you fail you have to give away your golden future large clockman to either a random person or a subscriber. (It’s okay if you don’t want to do it.]