Wouldn't 252 HP/4 Spd/ 252 Spe A- Persian be the standard? I typically see it run Foul Play, Taunt, Parting Shot, Toxic(Roar) sets so having SpA investment seems pointless.
Edit: Just calcd, best stat spread would be 244HP 8 Def A-Persian. Damage is still done though:
252 Atk Mimikyu Play...