Another option would be to leave Kodjia on the bench and bring him on for the last 30 minutes. He clearly can't play as a withdrawn striker to help the midfield when needed (as seen at Wolves), and Davis is a more physical presence for this type of match.
Johnstone
Elmo
Terry
Chester
Hutton
Whelan
Hourihane
Snodgrass
Adomah (DeLaet 75)
Onomah (Kodjia 60)
Davis (Grealish 70 if we need a goal, Samba 75 if we are leading)
Subs: Kodjia, Samba, DeLaet, Grealish, O'Hare, Hogan, Steer)