ok, good deal.
The most important you must have in your mind, is that all your players next season if you promote to the next level, gonna loose a star.
Your precious 6* player gonna be 5* the day 1 of the next season (LV2).
So you must be careful with your bids.
Try to buy lower q 5* players (near 80-85%) with less tokens as the lv1 managers are bidding like crazy.
In your auctions, participate managers of LV1 and 2 only so they don't know how the game works so really wasting their tokens.
From lv3, things are little better.