I have thoughts on how to avoid the showdown, but I need to get packing. (My parenthetical answer: make Moonicorn and SW’s relationship complicated from the beginning , realize they both want different things from the front (control and to stop being hunted), and make the threat big enough that they might need to work together, or at least don’t have time to worry about the other exclusively).
But I am utterly delighted that you found the Moonicorn doesn’t have a defy danger move: I thought that was the most interesting tech in the quick play, and it’s fascinating to GM.