How useless are Armia and Hoffman? Monahan's buyout isn't bad, so I think that'd be the preference over picking up players with term
Hoffman is what he is... his numbers are down this year, but that's more a function of the habs dysfunction & lack of backend offense support. On a team with better offense support on defense and where he's clearly a secondary/tertiary scoring support, no doubt his production will kick back up. @ 4.5M it's a bit much for a one-dimensional contributor, but he's pretty reliable to contribute.
Armia I'd actually rather keep, moving him is more a function of the habs having too many "slightly overpaid" vets on the roster and too much money going to bottom-6 forwards as it is... he does a lot of things well that don't show up on the scoresheet and has shown himself a valuable playoff bottom-6 player. He's a bit pricey as well, but also a pretty sure bet to be what he is... strong puck possession, reliable defensively, frustratingly inconsistent offensively because he has the tools to be a top-6 producer but only uses them infrequently.
Monahan buyout may be the way they go... issue is that the 2.375M cap cost comes with an empty roster spot that still needs to be filled, even at league minimum, that means 4+M$ cap cost... flames are going to be challenged to extend the core pieces they need to re-sign (or replace) this summer as it is.
the deal proposed gives them 2M$ in space while maintaining the existing roster spots (minus Valimaki, who is in Stockton as it is). Both Hoffman and Armia could also likely get moved down the road if they decided they wanted to move those contracts.