I reckon Fuller will be available on Sunday if NSC lose on Saturday. But if they win on Saturday, then I suspect he won't be available because they will want to take him to Lords on Sunday just in case they need to pick him in an emergency.
If he isn't available, then Albert comes in for him and we go down to five bowlers. If he is available, then I would probably leave out Brown in order to accommodate Albert.
If Baker and/or Currie are available, I would play them ahead of Jack/Wheal.
My guess is that Wood, Howell and Vince won't be considered. Wood hasn't played a 50 over match since the 2019 final. And Vince and Howell haven't played the format for a while either.