It would be good for hitting something like Houndoom or Spiritomb who may try to finish off a weakened Sawsbuck with Sucker Punch, which is pretty cool!
All the Sawbuck I've encountered have run SD/Wood Horn/Return/Nature Power. I've yet to give it a go myself in UU, but it was pretty decent in OU but sometimes lacked the power to get the kills unless you had a lot of support for him.