I'll just go ahead and recommend a set as well:ok, i can do a darmani... now i just gotta find the right set... but thanks anyway AuraSphere...
Darmanitan @ Choice Scarf
Adamant + Sheer Force
252 Atk/252 Spd/6 HP
Flare Blitz
Rock Slide
U-Turn
Superpower
Flare Blitz is for Sheer Force boost and STAB, becoming extremely powerful. Rock Slide is for Flying-types, U-Turn is for a switch-out and for scouting. Superpower is for Tyranitar, which is instantly OHKO'd by Superpower.
Although if you REALLY want to wreck things, go for Choice Band with Jolly, but you'll come to a Speed tie with Base 95 Speed Pokemon.