The narrow diamond is always a tough nut to crack. I used it exclusively in Levels 2 & 3 & won the League easily. Came a cropper in Level 4 when a couple of flank attacks found me out.

The two formations which I have found give it the most difficulty are 4-5-1V & 4-1-3W-2. I used the 451V last night in an away game & won 2-0 against the narrow diamond. Orders were normal mentality, down both flanks (most important), normal tackling, short passing, zonal, no counter or off side.

Hope that helps