Mitchell most definitely ain't a "British youngster" even if he is a 3 point rider so it would seem that the only option open is Wethers (5.65) or Sarjeant (5.80) & a 2 point NL rider.
Tom Perry a reliable 3 point rider after 5 years of Elite & Premier league speedway over Danny Ayers who if he didn't try so hard and throw away silly points we couldn't fit in the team. I'm sorry it would have to be Danny every time.
I'd agree with your other 3 though.