This is a general guide ( do it yourself formation ) so I would really appreciate not to ask here for a specific formation but generally talking about using formations & orders.

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Flank attack or middle?
4-5-1 V it's 4D-1DMC-2MC-AML-AMR-ST so of course you 'll go from the flanks with your AML-AMR unless you se that it's not working (DML, DMR have high rates and many tackling, so switch from the middle)