Based on general tactics and not taking into account opponents formation/tactics I think :

4-4-2 --> FP: mixed / SP: short or mixed
4-3-3 --> Fp: middle / SP: Mixed or long
4-5-1 V --> FP: Both flanks / SP: Short or mixed
4-3N-2W-1 --> FP : Both flanks or Mixed (depending on your MC's arrows and whether opp has a DM)

Passing style affects possession stats so long will cause more direct attacks but leave you chasing the ball more, short style will give you more of the ball and Mixed is self explanatory.