I have 11 'first XI' players who play every match unless they are injured or suspended. The 7 subs have alternate postions just in case I need to change formation to counter a team or try and get over some adverse condition during a match. I have 6-8 others who are youth graduates or lower-Q older players who are there mainly to make the numbers up for daily training sessions to get the 4x 10% match bonuses.