Thanks for your advice. The problem is there's a long way to go top levels and there's limited sources. We need a lot of green pack for power train session and the game reduces all player attributes by 20 basis points(losing a star) in the next season the player needing power train again and again to keep his quality percentage on the same level at least. so it's hard to protect sources while doing this without investing. i'm supposed to save them as long as possible. i'm looking for sweet point and the correct time that's worth trying.