Against 4-4-2 i would use what cracicot said.
I'm using the 4-1-2-1-2 Narrow Diamond formation by myself against the 4-4-2 formation too and it works good.
Halimo14,
I have the same problem like you. I am in the second leg, and will facing a 4-4-2 formation. The first leg he also use 4-4-2, I counter by 3-2-2-2-1 butterfly, flank attack, but the result I lost 1-0 despite my team is stronger at least by 5 quality point.
This time listen to my friends, I will use 4-1-2-1-2 Narrow Diamond like you. Will put 2 red arrow up for DL and DR to increase attack power. Hopefully the result is good.
Any comment please help out. Thanks