I have seen three other Ducks mentioned in this thread (Steel, Grant, Getzlaf) but had another option in mind.
Henrique is supposed to be returning soon and was having a nice bounceback year, looking more like his usual self, 20+ goal 40+ points and defensively responsible. I realize the Wild aren't eating that full remaining year on his deal without heavy retention, but was thinking something like:
Rask (1M retained, 3M AAV, UFA) + 2nd
for
Henrique (2.825M retained, 3M AAV, 1 yr)
Salaries cancel out for this year and the Wild have Henrique at 3M next season. Ducks retain heavily to get a decent asset out Henrique and use the remaining savings towards a UFA winger this summer.
I can understand if this isn't any more favorable for the Wild than trading for a rental and then reassessing in the summer. I thought Henrique may be a good fit with how much flexibility he offers to seamlessly move between center and wing - could be helpful when penciling in Rossi next season.