All combinations have one drawback, though: I play volleyball and I recently switched to right side from power. Offensive systems are the formations used by the offense to attempt to ground the ball into the opposing court or otherwise score points. If the setter does this well, the opponent's middle blocker may not have enough time to block with the outside blocker, increasing the chance for the attacking team to make a point. You may discuss preventative measures or other players' experiences but do not ask for medical advice.
Otherwise, Pure GCE gets my vote. Good product except the product isn't the best. I've tried a few different brands and this isn't the worst but it's not the best.