Welcome to the forums! Pretty nice stuff. I like a lot of the setups; they're quite original! It gives me some ideas for combos! I'm someone who likes to use the flashiest combo out of the bunch, even if it means sacrificing a little bit of damage.
I've been focusing on Raven and Hawkgirl so much recently, but this gave me some inspiration to start getting back on Catwoman now.
I especially like the combos at 1:40 and 1:50. I may be using them a lot, or creating variants of them at least. :]