I still believe that we should try to make a deal around Porzingis instead.
The way I see it Knicks need some really good defensive guards, so maybe we could send Smart and Bradley for Porzingis or Crowder and one of Smart and Bradley.
That way we can dump some salary and at the same time we would be strengthened on the bigs and they will be strengthened on the guards and maybe on the wing especially as they will the move Melo to the 4.
We would have to give up at least one 1st, and if we protect our good 1st then we have to send several.
Actually Knicks might have a decent starting five of Rondo and Bradley(that have worked before), Crowder, Melo and Hernangomez. In a week Eastern Conference that might bring them in contention for a playoff spot.