Buffalo may be more intersted with the Armia trade than the Hoffman deal.
At 6'3" 216 lbs he may be a decent line mate with Green way.

He's yours

If the Habs don't move out Edmundson in the offseason I feel that our defense will look like this:

Matheson - Guhle
Edmundson - Barron
Harris - Savard
and Xehkaj

That way Harris can move up to the 2nd pairing if Eddy's back issue flares up again and Xehkaj can slide in with Savard on the 3rd

Matheson and Guhle are our 2 best all around defenseman and would complement each other on the top pairing
Edmundson can play a solid stay at home style defense that would allow Barron to roam more (plus Eddy can protect Barron)
Personally I would prefer a 3rd pair of Xehkaj and Savard (they would give opposing teams the shivers)
But I feel Harris will slot into the line-up ahead of WiFi 😢