Martial and Greenwood or Rashford and Greenwood are our strikers. One attacks from the left and one attacks from the right.
Fred, Bruno and van de Beek is our 3 man midfield. It is mobile and capable of both pressing and winning back possession AND being creative when in possession.
Pogba plays as a false 9 and can also drop back and rotate with either Bruno or van de Beek. When this happens Bruno or van de Beek is the false 9.
The extra midfielder means we are less vulnerable defensively. This system would make our team more balanced between attack and defense.
I like Maguire and Smalling best from our CB options. If Smalling isn't an option I'd give Tuanzebe a chance.