#3. Wideman Romelu
If United were to play both together, one of the more likely scenarios would see Mourinho switch to his favourite 4-3-3 formation with Romelu Lukaku pushed out the wide right. In any case, the Belgian's natural inclination is to drift toward the right and cut into the box - and Mourinho could use this as a ploy - as deploying Ander Herrara as Right Central Midfielder would also enable Mourinho to ensure that Valencia has protection on his side.
This could especially work against sides that sit deep and don't offer much of an offensive threat.
However, in all likelihood, he'll pass this option along because Lukaku is most comfortable in an out-and-out striker position and could be a little lost out wide.
Likelihood: 4/10
Likelihood with Zlatan coming on as a sub: 7/10