How to beat formation 3-2-2-2-1?

[Potemy]

I'm using 3-2-2-1 and lost to 4-5-1 on away game. You can try it.

I'm not surprised, you had two players less!

Seriously, though, I love variations of 3-6-1, you'll dominate possession and all those midfielders can triple mark all attacking players. What were your tactics and arrows, and the qualities of the teams involved?