No arrows on fullbacks usually against wingers. With 4132 the fullbacks are needed to provide width, why I train them with equal ratings. If they have no wingers (aml amr mr ml) then red arrows. I once did blue arrows on full backs when they have much stronger aml amr and dl and dr then mine whilst I had stronger mid then him. Even then I was playing at home and can afford my full backs not providing attacking threat.

Against offence formation, force counter attack is v good way to win against it. The only thing is you do need to have a strong def to play that. My best players were my defenders until recently. (My strikers suxed balls and cant hit the barn door in the first two season so I splashed out on the most expensive striker on the market.)