This is the set I've been using to some success:
Kitsunoh @ Shed Shell
252 HP/4 Def/252 Spe
I honestly don't find much use for Shadowstrike on this set so I instead devoted EV's into HP. Yawn and Taunt forces switches; Will-o-wisp cripples sweepers. U-Turn allows a little bit of damage and Shed Shell defends against the rampant Dugtrio and Magnezone.