The only other thing I can think of is playing your starting XI with all your players playing OOP. Also put in your starting line-up your worst 11 players by quality as well. but looking at players stats... GK's seem to have good stats for a ST or any other position that they can play. It must still be possible to win a league in the lower levels especially by playing each game with an illegal formation.
By June-July time you will be playing in L8/L9.