Just seen an 18 yr old striker go for 40 Tokens in an auction. He was barely over 5 stars. Buying young and training them up is starting to look like a waste of resources.
You need to go for the just under 5 star players. The difference between training a player like that, and a low 5 star up to 6 stars, is just a handful of greens, but an awful lot of tokens.