Whoever is the most-likely to be developed into a Favors-ish player (4/5 that's mobile, can protect the rim) that is a legit threat from the perimeter, including guys that could maybe be traded up for. If I'm being irrational, I'm asking for something between Draymond Green and Zingis. A player like that would be the key to unlocking the full destructive potential of this team.
(I realize that could just be Favors but I think it's foolish to assume he becomes a perimeter threat [not just a guy that makes an occasional 3] in year 9.)