4-1-3N-1-1 has just 1 striker and 1 AMC + it is based on middle attack. forget about MC. u has just 2 attackers and both of them are at the middle. opponent defense just have to focus on the middle and it is easy to block your shot.
this is an example which lack of attack. he is using 5 defenders and this is worse for u as u cant break it with just 1 ST. personally i prefer ST over AMC .
here is an example of mine. this match is just 1 week ago.
Attachment 10029
i have wingers , and lone striker. surely he is using defensive formation so i use attacking mentality and win it easily.
4 of my goals are from
1) my lone striker solo goal
2)free kick
3)an assist from my ML to my MC
4)corner
if he is using defensive formation you should push him with attacking mentality.