In terms of possible trade opportunities, another factor might be who else is available in the draft at the point. If you would be willing to trade the first pick, but could still end up with say Olivia Miles a couple of pick later, while picking up another couple of top players, then a trade becomes more likely.
I realize Olivia isn't nearly as good at scoring or defense as Paige, but I think she is the only PG prospect that "if" she declares could be a alternative with other substantial talent could be considered.
I also think the Valkeries could make a play. There advantage is they could offer anyone on the unprotected list in the expansion draft. Dallas could see if a couple of the best available players plus the #5 pick would be attractive to them, the Valkeries could select them and then trade them plus the pick to Dallas.
I doubt they would trade the pick, but if Paige took a stand on it they very well might.