Just a thought since this is Silly Season:
Give away whatever draft choices / prospects it takes to get Kadri double-retained. Ideally, send Wood in the trade as well. Then, put Kadri between Colton and LOC. Nominally that is the third line. That said, most opponents 1st lines would absolutely hate playing against that line. It could be a shut-down line against 28+ of the teams' 1st lines. Then Let Drouin - Mac - ( Ritchie? Landy?) feast on 2nd lines while Lehky - Mitts - Mikko simply feast on 3rd line forwards.
Sure, Kadri probably has only 1 - 2 truly quality years left. But double retained, he could be an amazing 4C in the remaining years 3,4 and 5.
In theory, if CMac was forced ( or wanted to) let Mikko go, the Avs could put Kadri on Mitts' wing instead of Mikko for a year.
I don't think either will happen, but a combo of letting Mikko walk and bringing in a double-retained Kadri might add 2 years to the window.