In my opinion with your team I would give you these lines:

Drouin - Domi - Gallagher
Drouin and Domi have good chemistry together and you should see how they do with Gallagher.

Tatar - Kotkaniemi - Shaw
KK has played with Shaw before (I think) and KK and Shaw both should have second line.

Byron - Danault - Puljujarvi
Byron and Danault are good players.

Poehling - Thompson - Weal
This works because Poehling got his NHL debut hat-trick on a shift with Thompson and Weal.

Chychrun - Weber
You already have that. Yeay!

Mete - Petry
Mete shows great chemistry with Weber so why won't he with Petry?

Kulak - Juulsen
New combo but let's see how it goes.

I liked the Tatar - Danault - Gally line, they were able to do defensive missions while producing

the Petry - Mete line doesn't work because you don't want to puck moving D together.

I dont think it makes sense to break up the Tatar-Danault-Gallagher line just yet.

For the rest of the lines I would probably want

Lehkonen-Domi-Shaw
Byron-Kotkaniemi-Puljujarvi
Poehling-Thompson-Weal

With Suzuki starting in the AHL.

Oh okay