formations with 3 defenders dont use all DCs?

[adifairus]

i) 3W-3W-3W-1 - the key to counter this formation is you must have fullback to mark their wingers, must have 1-DMC to mark opponent AMC, use 2 or more MC to win midfield battle, suitable formation is 4-5-1 (V) or 3W-5-2 (V), mixed pass mixed area

ii) 3N-4-1-2 - again you need fullback to protect the side back if their side midfielder going forward, and need 1-DMC to mark opposite AMC, and need 2-DC to mark 2-ST, you can take advantage of their lack of side defend. best formation is 4-5-1 (V) attack down both flank

iii) 3W-1-3W-1-2 - again, again you need fullback to protect the side back if their side midfielder going forward, and need 1-DMC to mark opposite AMC, and need 2-DC to mark 2-ST, you need 2-MC to win midfield battle because your opponent only got 1-MC, and you can take advantage of their lack of center defend which is only 1 DC, use 3-ST, best formation is 4-1-2-3 focus through the middle. eventhough your opponent formation got DMC, but that's not really a problem to attack through the middle if you don't use any AMC.

seriously, beating any formation which only use 3 defenders, or only 1-DC or only 1-MC formation is too easy for me