Yeah, I don't think we need another winger, but if we were to go for a player in those front 4 positions, that would be the area for me as that is the area we have the least depth. If either Sane or Sterling aren't fit then we are either changing the way we play by forcing Kev out there, or slumming it a bit with Navas or Nolito (compared to Aguero or Silva coming in for Jesus or Kev in the other two spots). I'm not as convinced that Roberts is definitely a guy to be relied on next season and I don't see any young wingers in the academy knocking on the door just yet (Sancho is 16, the others are all happier in the middle rather than out and out wingers).
But the priority should obviously be fullback, then another central or holding midfield player (along with a keeper and a CB). The list is pretty long before I get to attacking midfielder