I don't have a preference, but I think the order in which you introduced the ideas is probably the order in which their greatest likelihood of meeting would be. However, I am not opposed to Daphne meeting all three of them at different points in the future.
However, it's also possible that Daphne and Cheyenne maybe met at some point in the last five years if Cheyenne's only been in Vegas for about a year. Daphne's traveled a lot, sooooo maybe they have at least a minor history?