hello everyone,i just have one question and i would appreciate any good advice about it.

I'm Level 4,and for the first 3 seasons i played this game,or i should say i let the game play itself on my android device,i can tell,with surprising results!
Now that i associated my team with a Fb account,guess what? I'm struggling going through this season,obviously cause of the lack of skilled players,but i just started buying few.
Now my formation is pretty weird,cause my main formation is good skilled,even above the average,but all the reserves are really crappy.
MY QUESTION IS: whenever the situation may require,would it be wiser following the counter formation criteria and renounce to a super skilled player to fit a worse one into a good counter formation,or rather going to play a match with the most skilled players i have, regardless of my opponent formation style?
AND MORE: how the average Quality affects a match when the 2 matching teams are way different on average team's skills,but they're equal on skills of the players actually playing the match?

Ty in advance for any answer!