Keep 14 player averange at 4 star (you can click on Qty to sort and make some math), so while new season start your 14 player averange only 3 star, but if you can make 2 star at next season then better but will take more cost for rebuild squad.
I always do this way if wanna take Cup and try to win triple crown, since Cup always make problem coz must play with +2 ~ +4 level if I don't lower my team quality.
All up to you, this only my personal experience
Final
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