something i have enjoyed using is:
MixedMoxieMence; (Life Orb) +76 atk, +182 Sp.atk, +252 Speed, Rash nature.
Outrage / Earthquake / Fire Blast / Draco Meteor
basically get it switched in safely, and use fireblast or draco meteor if they carry something like hippowdon, scizor, gliscor, landorus or terrakion or anything like that and kill or cripple the usual counter. At +1 with lifeorb, and a bit of atk ev's wont be anything crazy, but has decent sweeping potential with outrage vs anything that isnt a physical wall / steel type. Although life orb wears you down pretty fast and i dunno how efficient this might be at higher levels of play lol.
to give an idea; +1 outrage with 76 atk ev's and life orb will do 52-62% to max hp max physical defense hippowdon.
(EDIT): a Draco plate is a good alternative if the life orb damage is annoying. It boosts the outrage/draco meteor almost as the life orb would, but without recoil.