I dont know if we can count on Frost being quite ready for the NHL yet, there's a good chance he goes to the AHL to start out next year, which is hardly a disaster.
Given these options of forwards the best combo would probably be
Giroux-Coots-Panarin
Lindblom-Patrick-Voracek
JVR-Laughton-Konecny
Still dont really love the C depth because Patrick tends to go quiet for any given month at a time, and while I dont want to say G is done as a center, he's much more effective to me as a winger at this stage.
At the end of this post I think Ive moved on to wanting Duchene more as a signing, outside of the fact that he is literally cursed we do need a center more than a winger. Of course Id still be ecstatic if we got Panarin