what tactics 4-1-2-1-2 ( small diamond )

I am writing with google translator I play Champions League quarter-final. I played tactic 3-1-3-1-2. Opponent played a small diamond 4-1-2-1-2. I lost the first match 0:2. I played away. I had set: offensive, mixed applications, pressing the whole pitch, sharp reception, passing varied, zone and counterattack
My composition: ScreenShooter Composition rival: ScreenShooter

I know that there is gold tactics, but my advice would you like to play in the second leg?

3W (DL-DC-DR) is not wise since he attacks through the center (he has no wingers), change your defense to 3N (3DC) to block the center.

Ok 3 central defenders. And how to set the other players?

Ok 3 central defenders. Is such a setting would be good? Can you suggest others?