Well, my strategy in Rotation battles revolves around the Invincible Aron. He actually does better here than in Single Battles, with pokemon right beside him like Tyranitar and Whimsicott to cover his weaknesses and set up for him. I send out Tyranitar first, kicking in Sandstorm, then rotating to Whimsicott to Leech Seed, then having Aron sweep the field. The fourth pokemon would have to be a draw from Raikou, Suicune, or Entei, depending on the opponent. I'd tell you the rest of the strategy but I'm afraid I'll see you in battle XD