I just don't see Puljujarvi being traded at all as long as Holland's in office. The smartest thing that he can do is hold him in Europe for the entire season and tell him that it's Oilers or no NHL for you.
Ho-Sang or Sprong, OTOH, are far more gettable and IMO are the ones that Carolina will target and acquire. They would both be dirt-cheap (likely only at the cost of one of our excess Charlotte defensemen, probably Forsling), and you could tell either of them to agree to light up the AHL for the entire year and get your big shot in the playoffs or late in the season.