Is Count Denumar freakishly strong and agile? He would have to be to pull off all those contortionist stunts at such a great speed... He frightens me because I think he could be quite deadly if he wanted to, yet he portrays himself like a clown so that people would underestimate him I think. Dangerous he is.
If attacked (or complimented or engaged with in any way), Denumar's response is always going to be willfully misinterpreting mockery. I think he's probably capable of defending himself as you say, but he's driven by Roger Rabbit-style logic; some things he can only do when it's "funny"