How to win against 4-3-2-1 with AML and AMR? And what tactics and orders should I use

I would appreciate any help with defeating a 4-3-2-1 formation. And also what orders should I use?
----------st----------
Aml------------Amr
-----mc-mc-mc----
-----------------------
Dc--Dc-----Dc--Dc
---------GK----------
And the orders and tactics would be greatly appreciated. Thank you