Well, I wouldn't say "perfectly"..... As you suggested I used reds on ml/mr/dl/dr and blue on mcs. defensive down flanks short passing with counter attacks.
At 0-3 I switched to 3W-3N-2(aml/amr)-2 with normal mentality mixed passes mixed focus no counter.
Just like real life football ha? Unexpected defeat lol
Maybe it was too soon to say it works perfectly.
I am not sure why 3W-3N-2(aml/amr)-2 would work and my 4-5-1 flat variant wouldnt..
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