The two drood with three rogues is pretty fun, i would say its only going to be fun if you have heirloom weapons though. Their itemization sucks for majority of leveling. They just cannot have horribly substandard weapons like other teams can get away with.

For majority of your leveling you just going to be bear, feral dps, rogues and dual spec that cat into healing. Likely all the way to cata normals. A dedicated healer is just silly idle.