I will recommend something different.
I 'll give you as example, the team I 'm finishing now my season.
Click image for larger version.  Name: TEAM LAST DAY stats.jpg  Views: 207  Size: 62.1 KB  ID: 66047
It's very useful to have players in multiple positions.
With that roster, doesn't need to buy many players. Just 5-6 is enough, make a perfect rotation (for 4-5-1V), playing many games/earning progress and I can keep a low q for my Cup draw.
You can add positions
DC-DR +DL
DC-DMC + MC
ST+AMC+MC

Those new recommended player ST + winger are very useful

* those 7* players just got their 7th star.
** of course you need extra sources
*** I don't use DML-DMR