so, do you think 7 5-6* players will place me in a tough league next season?
lol, why you conclude this ?
I said
Finish the season with 7 5-6* and 7 3*.
not to have a tough season.

get players with more positions and 5-6*
try to find scoops, not necessarily to buy 5* players.
and don't make power-training (using extra greens) increasing quality , only train with current condition.
Keep your greens for next season.