Here are the best sets:
Physially defensive @ Leftovers or Chesto Berry
Bold
252 HP / 252 Def / 4 SpA
Volt Switch, WoW, Hydro Pump, Pain Split or Rest
(The item and fourth move go together)
Trick @ Choice Specs
Modest
252 HP / 252 SpA / 4 Spe
WoW, Volt Switch, Hydro Pump, Trick
Trick Scarf @ Scarf
Modest
4 Def / 252 SpA / 252 Spe
Have fun. Or try Rotom-H instead. It's pretty good.