The good ol' Hydration Goodra with Toxic, Infestation, Rain Dance and Rest is great in a Rain Team You could even take out Rain Dance for something that can hit Ghost Types, and possibly Steel since you can't poison them (like Thunderbolt, since Fire moves on a Rain Team = meh). Just don't bring it out against Scizor.
Incidentally has anyone tried using a Binding Band on this set instead of Leftovers? Worth it or not?