I have one older player with better quality and one younger player with lower quality but a fast gainer. I always have a dilemma on deciding which player to start the game. But most of the time i put the older player in my starting line up as i don't want to risk losing my match. But i also want the younger ones to develop more2. I tend to keep my strongest 11 in for all games so they can gain the skill points. Sometimes players slump in form that's when i might give them a rest so to speak. I know some players on here that use 11 players for the league matches and the second 11 for cup games