I usally use 3N-1(DMC)-3N-2W(AML/AMR)-1.

For the first leg match, I finally used 4-5-1 V style and won 3-1 (playing local with +13% posetion).

I will probably use the same formation 4-5-1V for the second match, but I'm certain I'll probably won't win that match because he is much better than me (25.5 v/s 29.4). But at least I have the 2 goal advantage.

Thnx RJSlow for the advice!!!