Hall-Zajac-Palmieri
Johansson-Henrique-McLeod
Zacha-Hischier-Noesson
Quennville-Boyle-Wood?
I putting Mcleod on the wing makes sense at least at first. Someone will eventually get injured and he can fill in after, plus it eases him in a bit. I'm tempted to put him on the top line just because watching him and Hall fly up and down the ice would be incredible regardless of how many goals they give up
However, whether it's Hischier or McLeod, I think only one should play center at first. Hynes needs to protect his young centers at first and give them favorable match ups, not just throw them to the wolves. Zacha is pretty good defensively and very skilled, so they seem like a good fit together.
Greene-Santini
Mueller-Severson
Moore-Lovejoy
I think that makes the most sense. I had a hard time putting Mueller on the second pairing, but who else do you put there? It wouldn't surprise me if Hynes flips the third pair with the second pair.