yeah you have a point. But in my experience I never use arrows on dl and dr if I have AML/AMR against me. Only if my DL/DR are faster. I don't like to use many arrows. I would like if my players stay in there position. I only use arrows on the weakest spots of my opponent
I would started on normal mentality. If I think that's not wright I choose for Defensive. And you should play down the flanks. You can try in the match play trough the middle. Start first with mixed passes. If you noticed that it doesn't work try long passes. I use 4-5-1 V style with only arrows on AML/AMR. If there nou threat on the flanks I put arrows on DL/DR