Reserved post
Edit:
Martial will flourish beside a world class attacker, don't think he will succeed sustainably as the main man. For some reason, prime Tevez strikes me as his ideal partner. Martial's strengths lie in 1on1 take-ons and finishing (space permitting), a second striker that pulls defenses apart and harasses them would be ideal.
Rashford is jack of all trades, master of none. Good at most things but not great enough to be a consistent threat in the box. I see him as a rotational player on the wing. To get the most out of him, we need a world class 10 or 9 (4231/442), and let him play the CR7 role in his early days (right winger running at defences).