depends on your team but i use either 4-2-2-2 hex or 3n-5-2 v style.
For 4-2-2-2 hex i used defensive, passing down both flanks, blue arrows on MCs and DCs, red arrows on AMR and AML
For 3n-5-2 v style i used defensive, passing down both flanks, blue arrows on all DCs, red arrows on AMR and AML
4-2-2-2 hex didn't work for me in cup final and I used same tactics, except the blue arrows on the MC's. If he has a good DMC it's probably the best to go with 3n-5-2 V, I would have chosen that formation as well but my DMC has terrible ratings.
13 seasons
League: 1, 2, 3, 4, 5, 6, 7, 8 ,9, 10, 11, 12, 13, 14
CL: 2, 3, 4, 6, 11, 14 (also 2 lost finals and 3 semi-finals)
Cup: 1, 4, 8 (also 1 lost final and 1 semi-final)