Swap Bjornfot with Spence and add another asset

This doesn't work because you forgot to re-sign Adrian Kempe and Sean Durzi. Once you put them back on the roster, some of the assets you see here have to go because combined they'll probably add at least $7 million to our cap. (Plus, then your 4 UFA signings are unnecessary.) And the return for Chychrun is probably short by at least a first. So I think that Alex Iafallo has to be part of any Chychrun trade (unless the Coyotes are interested in Cal Petersen, for some reason).

Arizona needs more coming back for Chychrun or else they won't do that at all