I actually think after Manchester United is been able to show Harry Maguire the door, Marcus Rashford should follow suit; honestly that should be the best order because I don't see Rashford improving especially in United shirts. He probably would do better in other clubs. For the sake of getting your players I feel Marcus Rashford should at least be given one more season at United. Just maybe he will be better under Erik Ten Hag.
Sorry to disappoint your logic but neither Marcus Rashford nor Harry Maguire will be leaving Old Trafford, and they won't even sit on the bench either. Football fans need to understand that as a footballer there is nothing wrong with having a purple patch (a situation where nothing works in your favor). It is normal; it should not breed hate or abuse from supporters. Ten Hag football style needs Maguire at cb (ball playing prowess), and needs Rashford on the wings (pace and physicality) so they would not be sold.
Harry Maguire simply needs to get his confident back; while Marcus needs a break from football to help him recover from 2 major surgeries (back and shoulder). Next season will be a better year for both players