Not necessarily Wolf. If I recall, he gets half his limits by using the one prior to it, and half by killing a certain number of enemies. Therefore, if one was to have Cloud kill enemies or use his Limit Breaks then kill him before the battle was over, he would still be closer to getting his next Limit without getting any closer to leveling up. Of course, this would be insanely difficult, costly, and time-consuming, so it seems rather pointless to me.