Im doing the same.Im 23th level but I played above 30 seasons.My tactic is that :
- One season I concentrate on the league cuz previous season I ended 8th or worst.In the new season I have very good players and I concentrate only on the league.
-Next season my 6 stars players are 5 stars players and I realised that there are many stronger teams than mine.If I see difficulties,Im concentrating only in Champions League and my purpose to become 8th or worst to be stronger in the next season.