Obviously the main goal should be to keep the core together.
Killorn should be fairly easy to move.
Johnson is the other obvious choice, but harder due to the full NTC. I have no doubt Johnson wouldn't want to move, and I doubt JBB wants to play hardball with him, but it might have to come to that. Johnson's NTC becomes a modified (20 team trade list) in a year so he would be gone by then anyway, maybe JBB works with him to find a more suitable destination this year, vs any of 20 teams next year. If Johnson still refuses and puts JBB in a desperate spot, he could always threaten to put him on waivers, apparently that's what Pittsburgh just threatened with Hornqvist to get him to okay the deal to FL. Certainly hope it doesn't come to that with a guy that just helped us win a cup, but some sort of tough decisions have to happen with our cap situation one way or another.