Tkachuk - Stutzle - Batherson : Batherson is not the ideal winger for that duo. Giroux is a better fit
DeBrincat - Norris - Giroux : Norris-Batherson is another great duo, I'm not convinced DeBrincat compliments them. I kinda hope they trade ADB for more of 2-way winger and and a great 3rd liner.
Greig - Pinto - Joseph : Formenton (if he ever comes back) is way too good for the 4th line. The problem is Greig also needs a spot and they are both LWs. I wish Dorion kept Paul and Brown instead of going for DeBrincat and Joseph. Would have freed the money and assets for Chychrun earlier
Sokolov - Kastelic - Formenton : Formenton too good for the 4th line. Sokolov might never be able to play regularly in the NHL because of his footsteps. A prospect you haven't named, Angus Crookshank, has a good chance to take that 4th line LW spot. He was going to make the team last season but he got injured and missed the full year
Boucher, Daoust, Halliday, Jarventie, Parker, Ostapchuk, Johansson : Greig is the best forward prospect by a good margin but is in your lineup and will graduate next season. Ostapchuk and Jarventie are comfortably the other best forward prospects here. Pettersson is a much better prospect than Johansson. And who is Parker?
Chabot - Zub
Sandersson - Chychrun
Brannstrom - Kleven : Kleven could use a developmental year in the AHL
Thomson, Tychonick, Bernard-Docker, Donovan, Nordberg, Roger : Tychonick and Roger are most likely busts, we don't talk about them anymore
Regarding the defense, I'd have Brannstrom-Zub together as they always played great together and with Brann progression this year, that would be a good pairing. The challenge here is to decide who among Chychrun or Sanderson will play RD. That guy would play with Chabot, who really needs him. I don't necessarily see pairings as 1-2-3 but I would split their TOI almost even at ES. Then special teams and game situations would determine the way the rest of the minutes are distributed. I would go :
Chabot - Sanderson
Brannstrom - Zub
Chychrun - JBD
Forsberg, Sogaard, Meriläinen : Sens need a good vet backup to leave the chance for Sogaard and Merilainen to develop in the AHL. They're still very young