Stone Edge is already used most out of any Rock type attacks, which isn't saying much, but it's extremely common anyway.
I agree with Focus Blast, though. I hate the constant missing.
Camerupt needs base 110 Speed. Then it would wreck; it's typing is phenominal offensively, but the worst in the game defensively. I have no idea what Gamefreak was thinking when they made him, but he needs waaaaaay better Speed.