step 1:
find the weak spot through each of their defenders quality and skills.
check either the fullback or centerback is weaker.

step 2:
a) use 4-3N-3 formation if their center back is weaker than fullback
b) use 4-3N-2W-1 if their fullback is weaker than the center back
**in this case you can focus in specific flank either right/left depends on which side his fullback weak.
**don't worry in midfield battle because you got 3-MC while your opponent only got 2-MC

step 3:
keep observe each of your opponent player rating during live match,
if you found one of his defenders rating turn red and decrease to below 6.5, focus your attack there