I would be prepared to override that 18 player squad and say, have 20-22 players and keep your options open to cover you from injuries and suspensions, next season, 5* players are rated 25-29 for you, so your playing squad will be downgraded to 4*, simply because the fact your playing at a higher level than the previous season so the player qualities are higher, every player loses a star on promotion and your able to buy better quality players on the transfer market.