how to win against 3-4-1-2 ( big CL game )

this is the first time i met this kind of formation , help me please master
-----gk--------
dl----dc------dr---
------------------
ml----mc---mc---mr---
-------amc----------
-----st------st-----

i can cover his amc with my dmc but dont know what formation and order would suit this game best . to counter him hard . and he got 2 MC ( scout ) and all the players are average to me . my team is better . but i dont dare to take the risk cuz ive lost to a weaker team :'( past few days

i was thinking going 3-2-2-1-2 with attacking mentality , mixed passed , zonal defense . no counter n no offside trap . what do u the pros think ? any idea to beat this . will gve a feed back bout the match .

4-5-1v with no arrows on the dmc, attacking, attack down the flanks, mixed passing and counter

nice advice dude ! i change the formation around 68 min . and i won 1-0 . it was a tough game . thanks.!