Red arrows on Dl/Dr are nice.They come to support at opponent pitch but bad side of it is low morale.Your dl/dr will face problems in shooting,passing or dribbling if they have less attacking skills.
Best orders for your formation are;
Mentality-attacking
Focus passing-mixed
Passing style-short
Marking-Zonal
Pressing style-high
Offside traps-On(recommended)
Since there is no Dmc so you need to play more in opponent pitch.so you need red arrows on one Mc and aml/amr.Blue arrows on 2 Mc is optional.