Flamethrower / Energy Ball
252 HP/ 200 SP.ATK/58 SPEED
What the set is for:
This set was created to ruin the opponent's Pokémon strategy, you just need to know when to send Staratagem on something that hates Choice Scarf (say.... Blissey?) and use Trick and then sweep.
Ev set and Nature explanation: the EVs were given to make Stratagem as bulk as possible and to give it some speed and lots of Special attack, but there're not much Speed EVs because of Timid Nature.
PS: YES, I have tested it and got very good results!