do NOT waste rest packs and/or tokens on power training someone in league 2. It will be a big waste because next season, even after the PT he will not be good enough in comparison to level 3.

I did this mistake last season at level 2. I PT'd a guy to 6 stars. Then I jumped from league 2 to league 3 and suddenly there are players on the transfer market who are 7 skill levels better than him (and they dont even have 6 stars, only 5).

Save your tokens for later.