Usualy, when i play a new and uncommon formation, i try to match his offence:

..........ST.........
....AMS..AMS....

>

-DL----DC----DR--
----DMC--DMC----
And the offence, is based on how many players he has on defence:

.........MS.........
....DMS..DMS....
DL..DC..DC..DR

>

He is packed, so what is his weak spot?

--------MC------
AML----------AMR
----ST----ST-----
3DC's against 2 ST's is not ood, DL/DR against AML/AMR is not good.
If the AML, AMR & ST's get good ratings, you will win.