team average quality

[forevel alone]

and what about the age of players?
and how many tokens can i afford to lose on one5 star player?

[CameraLagg]

and what about the age of players?

For me it doesn't matter. The younger the better but if you don't have much tokens you can by good 5* older players.. My midfield has 5 29 year old players that were 5* but they grew to 6* naturally.