It is going to be interesting to see how RBA and Daniels shake out the lines now. Rantanen can play center but generally hasn't. He is a +faceoff player who takes 5 draws a game even as a winger. He is 51% for his career, 53.3% this season. So if he ends up with KK as the center on the 2nd line, he can help with key faceoffs and when KK get's tossed from the circle (which is more than 50% of the time).
And then Taylor Hall?
So we could go:
Svech-Aho-Blake
Rantanen-KK-Hall
Martinook-Staal-Jarvis
Robinson-Roslovic-Jaaska
Flip Svech and Rantanen as desired. That 2nd line as I have it would be a physical nightmare to play against, not because they would out there hitting everyone, but go ahead and try to outmuscle that line in the corners. There will be a lot of juggling options, but I would think that Hall is going to be the 2nd line RW to start. Certainly though the coaches could just staple the new superstar with Aho, that would make sense to do.
Some miscellaneous stuff on Rantanen and Hall
* Neither of these guys have been penalty killers. Like, ever. Hall has averaged 8 seconds of SH TOI per game in his career. Which is a lot compared to Rantanen's 2 seconds per game.
* Shootouts? No help there. Rantanen is 8 for 27 (29.6%) Hall is 6 for 26 (23.1%) For perspective, Svech is 11 for 25 (44%) and Aho is 6 for 25 (24.0%)