It's hard to think about BB as being skilled at anything.
Ace was whooping his ass until the hax DF hammer came down on him. No speed feats, his strength feats aren't that great either. No evidence of hand to hand combat skills, he seems to be a brawler, and is a coward to boot.
I think all of that is intentional. Even Jinbei told Luffy that BB is an unknown quantity at IP, BB to me is to remain a mystery until we see what he is really capable of.