This means that if you wanna keep a clean sheet you should not be using this tactic, however if you are about wining no matter how this is the tactic for you. Sure it will have some results like 3:4 or 4:5 but also you will be getting results like 4:0 , 6:0...
So without further ado I present you the tactic.
Of course it is one of the most used formations in the game but with some of the new roles added in FM15 4-2-3-1 is better then ever.
I didn't came up with these myself, I've read an article about them on this site .
Leave it like that until Team Chemistry and Tactic knowledge are full.
Set the individual training for the role they are currently playing.