4-1-2-1-2 narrow sucks big time. Major weakness down the wings.
4-5-1V is best. It's what I play.
I usually go for 4-5-1V, down both flanks, normal mentality, hard tackling against strong opponent, own half, short passing with no offside and no counter or mixed or long passing with no offside and countering. But that's just my average tactic, it's upto you how you want to play it.
yepp lost to stupid side playing 442 bcz of it
i usually go for a mix of 4141 & 451V
but today i played 442 side in CL, beat him 3-0 , with 43N2W1