There is no doubt that Manchester city is winning two trophies this season just like you mentioned above. They are the strongest in FA Cup finals as Manchester united will not be able to withstand City in that match. We know how poor United performance is and that makes me give the cup to City. After all, when City clashed with United in the finals last season, City won them and the same thing will repeat itself again.
The better option for Manchester United if they are to have a chance in that game is for the coach to make use of young players like Diallo, Mainoo with a mix of the experience of Bruno Fernandes in their midfield for creative opportunities. He should also play Casemiro in his original position now that Lisandro Martinez is back because Casemiro has struggled with adapting to the role central back. If Ten Hag wins the FA, there is no doubt he will remain as coach of the team.
There are things that need to be done and I agree with them that they should try to be more daring with their schemes and positioning because it could be an advantage in the end.
Ten Hag sometimes tries some extreme moves where he puts players who are not even really suitable for their positions which makes Manchester United's conditions unpredictable.
These shortcomings must be minimized in the end because currently only 2 final wins can bring them a little smile and be believed as one of the clubs that might be able to develop next season with their current poor achievements.
But on the other hand some Manchester United players are also actually still not able to completely eliminate their ego because if we see there are still some players who prefer to play alone with excessive dribbling rather than maintaining teamwork.