Superpower and Play Rough are pretty redundant together. You don't really gain any notable coverage. Pick one or the other.
On Swords Dance sets, you really don't need Superpower since all of the Superpower targets are OHKOed by something else with a little bit of prior damage (iirc, Absol has a small chance to OHKO 252/0 Heatran with +2 Knock Off with just Stealth Rock, and +2 Play Rough slaughters Tyranitar,) and you get all of that without Superpower's nasty Attack drop. All-Out Attacker sets would rather have Superpower, though, since it needs to have that in order to handle Heatran and Tyranitar.