Kipsang's selection is likely a done deal after today.
I don't think you pick 2 guys who just DNF'd for the rest of your team. Maybe 1. And if I had to pick the WR holder or the Boston/NYC record holder, I'd easily pick the latter.
So who do you pick for the last spot? Has to be Mosop or Kirui, which is a tough decision for me. I would lean towards Kirui for a team with diverse strengths. You'd have a guy who's shown he is a solid time trialist and major marathon runner, a guy who's shown he can beat great fields in a major marathon, and a guy who is more of a championship race runner.
Kipsang/G Mutai/Kirui