What are positional strengths and weaknesses? Can you outmatch him with 3 DCs vs his 3 ST?

His formation is weak in center, so 3 midfielders should yield a good possession advantage for you. He's probably using defensive/ force counterattack so maybe use DMC (I'm cautious!) and 2 MC. You need 2 wingers, so AML and AMR, then either AMC/ST or ST/ST, whichever gives you the best situational advantage.

That's just my philosophy - solid defense, then set up and exploit regional numerical/skill advantages on the field.
Fair disclosure: I'm fairly newbish, level 2, with a record of 20-2-1 with +50 goal dif. in my first full season, so take my suggestion with a healthy dose of salt.