I have at the very least:

2 GK
4 players with DC
2 players with DL
2 players with DR
2 players with DML
2 players with DMR
3ST
2 players with AMC
2 players with AMR
2 players with AML
2 players with MR
2 players with ML

So basically I make sure that in my 22 players I have.

2 GK
7 Defense
10 Midfielders
3 ST

This should sum it up nicely:



What mine says to me now is that I can get rid of a DC and I need someone with an ML and DML and DL position.
So I get rid of Oliveira(DC) and get a ML/DML and then get rid of either Setiawan(DC/DMC) or Vandermeer(DC) and pick up a DL/DC and then I have 2 or more at every position.

With this setup i can play any formation and always have a backup for any position. The only formations that this is not covering is any formation that uses 3ST. I refuse to get 4 ST, since I find 90% of formations only need at least 2 ST.