I agree with the back line, but I'd like to see Iceland in there for this game. I'd give Tosun and Theo a rest (particularly with Richy out) and give Prince Oumar a shout in this one. I'm fine bringing Tosun in off the bench. With Theo's injury history, we can't risk him here - Lookman and Bernard on the wings should give us all the pace we need.I'd go
Pickford
Coleman(c) Holgate Zouma Digne
Gueye Davies Baningime
Walcott Tosun Lookman
In goal; no need for rest/rotation/cup keeper
Coleman in for experience at the back with Holgate/Zouma. Play Zouma left so he and Digne are ok communications wise.
Gueye/Davies because I don't know what our other options are! Beni did enough last season to earn a go in the cup.
Theo to come off after 60 mins for Bernard
Cenk has been great but I'm sure he'd feel better with a goal
If this isn't the game to play Lookman then I don't know what is