Ok - lets look at this deeply:
1) Milner - think he will break down every other game should he even last 90 minutes in any one game.
2) Ronaldo - yes he lasts but only because he is a goal-hanger and for the best part does fuck all in games other than be the point man to score when an opportunity arises. Overall his involvement in the game is minimal, and does not involve that much running - Mo is not that sort of player.
3) Lewandowski - the ultimate goal-hanger striker, yes can do the business, but we don't use such a player in our team anyway, we don't have the requirement. Mo is both an active wing forward and by chance has turned into our main goal-scorer.
4) Messi - declining even last season, don't expect much.