The Wizard isn’t supposed to be the most powerful Mastermind by any stretch. Let’s face it, he’s not Thanos…or really even on Kingpin’s level. But he can be annoying. His Mastermind card and Mind Control Helmet work well together to try and slow you down from fighting him. I have to say, I really love the idea of Escape Artist. Like I said, Wizard isn’t a top tier villain but when that Tactic comes out of the Villain Deck you’re going to want to take him down quickly.
The Four aren’t anything too powerful, but again they can be frustrating. I am particularly fond of Trapster and his “glue gun” mechanic.