Over the cap. As per usual

It's gonna cost you more than that if you want the Canucks to take Johnson

Oilers decline
Take Samorukov out of the trade and you have a deal

What if I made the 2nd a 3rd?

No doesn’t work
Look what Vegas got for Nate Schmidt when they needed cap a 3rd, Schmidt is a very good D that can play the right side in your top 4, I’d put Killorn and Schmidt in the same value, slight edge to Killorn, but Schmidt can with more cost certainly as he had more term, so I think a good cheap backup and a 2nd is more then enough