This is... really, really freakin' awesome. I'm not familiar with your system, so I can't really judge the balance of the class. I'll try, but bear in mind my advice is from a D&D 3.5 perspective.

That, and there are obviously more rules. The twentieth level ability says that the Professor can use his abilities outside the Circus and projects a small RIngmaster's Aura, both of which will need explained.

Still, expect me to follow with great interest...