I know I brought it up before, but now that this team is pretty much out of the playoffs and what matters is getting guys right for next year, would you put DeBrincat with Toews and Kubalik?
DeBrincat has played well with Toews in the past, and maybe being with those two will spark him to finish the season on a positive note. Obviously, DeBrincat is much more important in the long term than Caggiula is, so I'd like to see them try to spark something in DeBrincat.
If it works, next year looks like
DeBrincat-Toews-Kubalik
Saad-Dach-Kane
??-Strome-??
??-??-??
That's not a bad formula, and you still have some offense on the third line. I think Strome would do better with some bigger bodies with speed and who can grind, and you can find those guys for him during the offeseason. Also, Kane could double shift down to Strome's line from time to time.
I think this is how I'd try to set it up going into next season, assuming there are no major shakeups of course.