3N-4-2W-1, attack both flanks.

----DC--DC--DC----
--------------------
ML---MC--MC----MR
AML------------AMR
--------ST---------

Or if you feel you need extra defense you can drop back the defensive wings to a 5W-2-2W-1:

----DC--DC--DC----
DML------------DMR
------MC--MC------
AML------------AMR
---------ST--------