This is assuming we only sign Mkhi and Ibra. You can assume potential or w.e but I'll just go by what I think will realistically happen.

My front 4 would look like this:

    Ibra

Martial Mkhi Lingard

This is the lineup that I think will end up being Mourinhos go to by the end of the season.

Depay - I dont see Martial starting striker next season because of Ibra and even rashford. Memphis is gonna have to not only play RW more but also has even less room for error now due to our increase in depth. I dont think he will have an amazing season - at most 15(goals + assists). So like 10 goals 5 assists is what I see him getting in all comps at best due to not playing LW.

Mata - I think we might see him at no.10 but I think he will have the same problems as before. Overall just doesnt have the workrate that Mou wants and to his credit Mata has improved at tracking back and actual defensive work, but his lack of speed, height and strength will keep him out imo ( gone in jan or even before that ).

Rooney - We may see him alot at no.10 again which im actually fine with but I think he will move to a more number 8 role with a pivot behind him.

Dont really have to say anything for Mkhi, Ibra or Martial - they will do well.

Lingard - I think Mou will be surprised as he has the defensive workrate, speed and desire that Mou likes. In terms of Lingard and his quality I think many fans have ruled him out as just a squad player, but you have to take into account this is his first season proper season. He may be 23 but not every player is at their peak by 23...look at Mkhi and RVP as examples, Lingard will only improve from the past season and even after all his chances wasted he was by far our best RW last season, I think he will continue that.

Basically I think that early on will might play with rooney or mata at no 10 with Mkhi on the right but eventually Mkhi will move more centrally as they (Rooney and Mata) failed. Thus leaving us with our next best RW - Lingard.