if you can get 5* players in auction for 10 tokens or less, then go for it. buy as many 5* players as your in-game money can afford. if auction in your server is competitive, then just buy 3-4 scouts every start of the season. then supplement them with a few players from auction. that's what i did when i bought 500 tokens. i won the league from level 1-9. btw, i bought the tokens towards the end of level 3.