I am currently using this:

-----ST-----
-AMC-AMC--
-ML-MC-MR-
------------
DL-DC-DC-DR

Works semi good, but is there any other good formations wich can beat the standard ones
4-4-2
4-1-2-1-2
4-3-3
and so on...
I am level 12 now, and could you maybe also share your settings for the formation?
Would be great since im starting to loose =/