I think Stone is this team's darkhorse. I don't think he's quite ready for L1 minutes, and with BFR on L2, Stone is relegated to L3. IMO he's the perfect player to anchor an offensively productive, defensively responsible L3. Not sure if Puempel or Lazar are capable of handling L3 minutes next year, but they would make a very interesting L3 for the Sens -if- the Sens find a top 3 RW.
Mac-Turris-XXX
Hoffman-Zib-Ryan
Puempel-Lazar-Stone
Michalek-Pageau-Chiasson
I think that's a real solid lineup if Puempel and Lazar live up to expectations and the team rolls all four lines.
The question then becomes who best compliments Mac and Turris. The obvious answer is to acquire someone via trade but I'd also be willing to move Stone to L1 and see if Prince can contribute at the NHL level on L3. I think Prince is perfect trade bait, but assuming he stays with the Sens I'd like to see if he can contribute.
Same goes for Claesson and Wideman, which IMO, makes Phillips and Wiericioch expendable.