There's zero chance Ainge is trading the Nets pick before the trade deadline, short of a godfather offer from another team that makes us a contender right now. They're not trading it for Hayward or Favors alone -- not until they know it's not the #1 pick. So I think you have at look at other assets if we're talking about this 'bold move' possibility from Utah for either one of them.
That said, I agree their two most likely moves are Hayward and Favors. Would you trade Marcus Smart for Hayward? Or Favors? I suspect Ainge would trade Smart for one of them -- both are excellent players -- there's some logic to either deal for both sides. But is one of them enough to move the needle, and give up on Marcus this early? Meanwhile, are the Jazz going to settle for just Smart for either?
That said, what about a deal for both? If the Celtics offered Utah: Smart, the Nets 2016 pick, the 2016 Dallas pick, Minny's 2016 or 2017 2nd, Memphis' 2018 1st, Amir Johnson and David Lee, for Favors, Hayward, and Withey, who says no?