Top six:
Laine/Connor-Little-Wheeler
Laine/Connor-Scheifele-Ehlers
I think they should split Ehlers/Wheeler in the top six (puck carrier and table setter), and put Connor/Laine with the other (goal scorer and feaster). This also lets you split the rookies, but "shelter" them by keeping them with good linemates (QoT is bigger factor than QoC).
Third Line
Perreault-Burmistrov/Petan-Dano
Honestly, time to move on with Stafford. The Jets ran Perreault-Burmistrov-Dano and together they were honestly good enough to be a second line on most teams (64% Corsi and 67% expected Goals). Would dominate as a third line. Switching Dano for Stafford scares me. If Petan is able to take a top9 C role in the NHL, you replace Burmi with him. If not, he's the first call up with any C injuries to slot in 3C. The Jets are deep enough team that size will not be an issue.
Fourth Line
Best of rest.
Fourth line, you just take the cream of the crop between the rest (Lowry, Copp, Armia, Lemieux, Lipon, De Leo, Petan, Thorburn*).
* lol
Defense
Trouba-Byfuglien
Enstrom-Myers
Chiarot/Morrissey-Postma
Chiarot - Stuart
If Morrissey is ready, he's ready and Chiarot and Stuart shouldn't be regulars when everyone is healthy.
If not, it's okay.