Also, since my oppenent's 4-1-2(ML/MR)-2(AMC)-1 formation is very similar to 4-3W-2AMC-1 Xmas Tree...

... where a 4-5-1 formation is recommended, then wouldn't the lack of MC in my opponents lineup (DMC there instead) mean that I could go for 4-4-2?

Or do I need to look at total midfielders overall, so if my opponent has 5 (incl. DMC and AMC) then I should also have 5?