I see Malamar as an absolute crusher of set-up sweepers with this set:
Malamar(Contrary) @ Focus Sash
Jolly(+Spd -SpA) 252 Spd 252 Att 4 SpD
Topsy-Turvy
Psycho Cut
Foul Play/Night Slash
Superpower
It won't be taking many hits do to it's craptacular typing (Seriously, NO resists?).