Benson-Kulich-Thompson
Peterka-McLeod-Quinn
Zucker-Krebs-Tuch
Kulich is an experiment but with Tage on the wing, who else do you put at 1C? I don't think Kulich is a 1C at this point but you don't put him between JJP and Quinn; too much inexperience there. Benson seems to be showing complementary chemistry with Tage. Is that a first line? Maybe not, but it's not a bad line.
JJP and Quinn need a center with some experience and defensive responsibility. They're clicking with each other right now and McLeod is the glue that holds the line together.
Zucker-Krebs-Tuch isn't a defensive line per se, but they're all defensively responsible as a unit and with Krebs providing the spark they're a pretty good energy line. Against another team's 3rd line I would expect Zucker's experience and Tuch's scoring touch to win the battle.
I like the makeup of these three lines to be honest, given the roster construction.