This is actually the best option I've seen, but I wouldn't trade Dermott tho, Rathbone isn't a safe enough bet and I really think that Dermott is bringing something interesting to the game, I would personnaly trade Rathbone

I do not see how Vegas needs a RHD.

Martinez, McNabb, Hague left side
Pietrangelo, Theodore, Whitecloud right side
Hutton, LHD, is the extra, Korczak plays the right and could definitely get a few games, they re-signed Miromanov who is a RHD.
Martinez can also play the right and has done so for Vegas before.

I like the VAN and CBJ trade. Probably could even add something like Liam Foudy, because CBJ has a lot of good center prospects.
Foudy would bring more speed to VAN making the team faster. Foudy because of retention

Interesting, I think we should give Rathbone a chance though.