ok, but i think maybe you don´t know why we use zonal marking and not m-o-m and how it works?

3dc will mark all Players in the 5 Defending positions. that means the left dc will mark Player in dl, left dc and middle dc. not only this positions. they will mark Players in dml, dmc left and dmc Center, too.

with all other positions in Formation it is the same. not always we Need a dmc to mark an amc.

that means too, that 4 defenders will mark 3 st and you wont Need 3 dc

that s the reason why 4-4-2 C or 4-4-1-1 are one the strongest formations

another example is, with 4-3n-3 p.e. you can Play mixed or flanks, because left and right mc, st have short ways to attack the flanks.
yesterday i tried it with 4-3-3 against 4-1-2-1-2 ND. i attacked the wings an won 3:0. it will be a nice experience for you, if you try it.