My plans for this include having 5 young reserve subs who will rarely see the field but make up for the bulk of the training regimen. All are 19-20 years old.
I also have 2 high 5* Gks, one of which will be taking Cup and CL duties, while the other with be strictly for league contests. That leaves me with 15 outfield players. I have 5 defenders, 3 MC 2 wingers, 2AMC and 3 STs. I will be using greens to rest inbetween matches when necessary and rotating based off of form increases/drops and counter-formation picks. If I have to drop out of one competition purposefully (unlikely) it will be the cup as I still haven't won a CL trophy and based off of groups I have a reasonable chance this season.