Strength doesn't matter in games in the slightest, so I just pick and use Pokemon I like. Seriously, strength in-game doesn't mean crap. I beat Drake's Salemence with a Petal Dancing Bellossom that somehow survived some Flamethrowers in a row. I even used a Corsola during one play through. Overall, when it comes to competitive battling my choices vary. But I see no reason to be stingy in-game.