first 2 are horrible for Nashville

Leafs would still have to get rid of 3m more cap to make that trade. No, I gotta think the Leafs trade Johnsson for not very much in futures, keep Mikheyov and the pick and then have enough cap for a Dman like DeMelo.
Like the the Nashville/Minni trade for needs of both teams. But gotta think Duchene at 8m X 6 years is unpalatable for Minni. Plus Duchene's 7 team trade list might be a factor.

Duchene’s NTC is only for the last 3 years of the contract.

Thanks for the correction. Sad, I looked and contract, read it, but my brain isn't functioning at 1 AM.

What if this was a 3 way:
TOR Recieves:
Dumba

MIN Recieves:
Duchene

NSH Recieves:
Johnsson
2020 1st (TOR)