Im still hoping we can grab a pick for Joseph. If we pay Mills (which I expect we will) then we won't re-sign Joseph after next year, and after a couple good playoff runs where he has shown flashes I think we could maybe grab a late first/early second or him. I wouldn't want to package the #30 with him just to move up a couple spots though, it'd have to be for an extra pick.
Obviously it's a risk if Mills gets a big offer which we don't want to match, but it could be a risk worth taking. Bucks and Sixers both have two early seconds, I think one of those could be had.