If Semenya is 1/6, I don't think it makes sense for Ajee Wilson to be 10/1, surely Niyonsaba is still a favorite over Wilson? What are the odds for Niyonsaba (and Wambui)? I think I'd bet against Wilson but that's a tough way to make money... 40:1 seems pretty generous for Lipsey as well.
I'd bet on Justin Gatlin winning because I strongly dislike him, so either I win money or he loses.
Donavan Brazier at 9:2 for a medal seems pretty good, I'd put money on him.
14:1 for Paul Chelimo as well; isn't Chelimo most likely to win after Farah?
Jenny Simpson 16:1 for a medal -- I'd put most of my money there.
Ayana is tricky, 8:13 puts her as a huge favorite but we just have no idea what shape she's in.