Another top-of-the-head idea.
Toxic (Or anything you want)
Aerial Ace is the best move I could find for Swellow for STAB unfortunately
but use that to get a clean cut off of the enemy ALL of the time. Facade is also there for STAB, but you get an extra bonus considering that it has Guts and Facade's power is boosted, along with Swellow's attack power.
HP Ground can serve a little bit as a defense against Electric, Rock, and Ice type Pokemon. And Toxic... Well I just put that in there.
You can be the first to experiment this if you want. It should turn out a little efficient.