So. I'm going to go into this assuming the following things...
1) 100% health
2) They got Nash to play with Krejci. Nash and Krejci are a pair.
3) 63/37/88 is set in stone
4) They want enough guys that can PK
5) They want a physical 4th line
Marchand Bergeron Pastrnak
XXX Krejci Nash
XXX Nash XXX
Schaller Kuraly XXX
You have Heinen, DeBrusk, Donato, Backes, Accari and Wingles fighting for those spots.
A kid (Heinen, DeBrusk, Donato) will be at LW on the 2nd and 3rd lines.
Then you need to decide between two options.
1) The remaining kid on his offwing next to Nash and Backes on the 4th.
2) Backes on the 3rd and the remaining kid in the press box.
3) A kid on the 4th, but really only DeBrusk fits that style.
But, here is the thing. They won't be 100% healthy for the entire playoffs. No one ever is. The great thing is that there are multiple different combos that can work on this team if and when people get banged up.