For next summer probably Kane would be a very good signing. Also a right winger with pace and someone who can consistently deliver. Doesn't really need to be right winger, just comfortable on either side. Reus/Griezmann are semi realistic, Muller and Bale not realistic, and then the back ups being like Mane/Mahrez/Felipe Anderson, or just Januzaj/Lingard/Pereira from the younger players.
In tough games:
Martial Kane ????
Schweinsteiger Herrera
Schneiderlin
Shaw Jones Smalling Darmian
De Gea
Easy games:
Martial Kane
Memphis Schweinsteiger Schneiderlin ????
Shaw Jones Smalling Darmian
De Gea
For ????, sub in Mata/Reus/Griezmann/Mane/Anderson/Bale/Januzaj/Pereira/Lingard. Mata if we don't sign anyone. We could probably do with someone like Pjanic/Thiago/Veratti/Gundogan though. Someone who dictates games from midfield but is also creative and attack minded. Thiago does it brilliantly for Bayern, so we need someone like that here as Herrera isn't really that type. Would replace Carrick kind of as Carrick probably doesn't have too long left anyway. Though that could just be Pereira developing as he has the potential.