Yes, that is to punish Martin Lapointe, Daniele Briere and David Perron. So there!
Personally, I would offer:
Calgary 2025 first rounder
Christian Dvorak
Filip Mesar
2023 4th round pick
2023 5th round pick
for Dubois and Dillon
It's not great, from a WIN POV, but I think it's alright considering that WIN does not have much bargaining power with a player that refuses to extend his stay there and will cost a heap of money towards the cap for any contender looking to get in on the action.
Contending teams are usually cap-strapped, or near being strapped.
As much as we can make an argument for an astronomical return to WIN from some of the contending teams, it usually amounts to lateral moves that can be an improvement in the very short term, but not in the medium or long term.
For these teams, at that point, you are better off adding Tarasenkos and Kanes, for example, than paying through the nose for Dubois.
The alleged competition with MON's fair offers won't really be all that prevalent/present, IMO.
An unprotected CAL 2025 1st rounder (who knows where CAL will finish win the standings two years from now), Christian Dvorak as a 3rd C, depth addition with two years left on his contract, Mesar, as a potential option beyond Perfetti at C if the there doesn't cut it, or as a speedy offensive winger with good vision, plus two later round picks in 2023 that we have extra picks for (the rounds), might end up being one of the better offers WIN gets?
Switch those two 2023 mid draft picks for MON's own 2nd round pick and I think it definitely becomes more interesting for WIN.
It would be the equivalent of two late first round picks, three ion you consider that MON's 2023 2nd round pick isn't far off, plus a depth C with term for Dubois.
Not sexy, but not nothing either.