If all were available I think I'd go with:
Vickers
Nyambe Nelson Cashin Forsyth
Thompson Fornah Bird
NML John-Jules Barkhuizen
My thinking being.....
* either Vickers or Wildsmith is fine
* John-Jules simply cannot be a poorer option then Collins, Washington or Waghorn
* Thompson is a quality player who was starting to show his abilities before his injury
* Ward or Wilson could replace NML with Sibbers doing the same with Barkz
* Brown to be the first option up front off the bench
* the other three subs to make up the 18 would be Smith, Hourihane and Waghorn
* I might have missed an obvious one out but there's no place in my hypothetical matchday 18 for Elder, Bradley, Washington or Collins