I like the Nicholson bet. He's could easily overpower the Joker. Don't much about Silva. Think the over isn't good in that Volkov/Misha, both fighters have finishing power. It's just gambling, you might as well bet on roulette.
I do like the over on Camozzi/Smith and Musoke/Bojan. I also like a bet on Musoke, I think Bojan has terrible grappling and takedowns.