If it's worth anything, I think Edmonton wins all of these, relative to market values. Puljujarvi may have infinite potential, or not. Nobody knows, but right now, he's holding out, which could make a lot of GMs think signing him will be a headache.
Kreider is two years older than Ghost, with one more fifty point season, but he plays forward, and Ghost plays defense, so Ghost is inutitively almost twice as valuable.... except that Kreider has a reputation for defensively sound play and Ghost doesn't, so maybe at the deadline, if the Flyers have other defensemen playing better, and they really need a wing to make the playoffs, and there's picks thrown in to balance it out a little?
And if you leave an Ottawa offer unanswered long enough, someone from Ottawa chimes in to say they don't want your old, useless players, and they've got some kids coming up out of juniors, twice as good. But they haven't yet, so on Ottawa's behalf, Matt Benning for a third round pick is accepted. No takebacks.