Maybe it depends from the tactic.If you're trying to put red arrow of some DC,there is an option to score,but there is an option to fail.It depends from the opponent's tactic.If he plays with counter attack,only your DMC will help you in that case.DML/DMR with blue arrow...hm I never tried but I agree it helps against aml/amr.At least there is a logic.This defensive formation 3-6-1 I use very often,but instead one of this MC,I use AMC.Playing defensive with counter attack.If he doesn't have AML/AMR,I play with red arrows on my DML/DMR with mixed passes.If he has AML/AMR,I'll try your way with blue arrow to check is there really effect.Then I'll try counter-attack thru the middle.