I'd revert to a 4-3-3
Cech
Bellerin / Koscielny / Mustafi or Holding (easier fixtures) / Kolasinac
Elneny or Coquelin / Wilshere / Ramsey
Sanchez
Giroud / Laazette
Fed up with Ozil and Xhaka, Wilshere is a workhorse and we need that fighting edge at the moment.