Wrong section to ask, anyway, as Vynacio suggested for 3-5-2 or 4-4-2 can go for counter 5-4-1 or chose any of the followings:
3N-1-4-2, 3N-4-1-2, 3N-1-3MC-2WAM-1, 3N-1-5-1
I believe best trick is when oppo has 5 at the back you leave 3+1 for your back and control the midfield, ; like 5-4-1 comes with 4 midfielders, you go with +1 or more; good luck