Everyine should just do the best with what they have. "Tanking" is pointless. You can still save your money and tokens, maybe make the top 7. Just don't spend your money or tokens. Save up your boosters. If you get promoted great, the next season you won't need to tank, because your team will be rubbish anyway.

If you are attentive enough, you will never spend more than two seasons in any one league.