Sounds like MN has a very well thought out plan with the expansion draft that involves keeping all the D they have and coming out of the expansion draft with a good top 4 D still in tact, although after losing one of these guys for free.
But, if they trade one of these guys... they lose the other one for free instead... leaving them with a big hole in the top 4.
I think it's more involved than that. If Reilly delivers on his promise this year as a top 5 ( floor) PMD/ PPQB, Dumba settles down defensively, and Olofsson stays healthy( Brodin replacement),then the Wild MIGHT consider trading two of their top 4 Dmen excluding( excluding Suter)before the draft for forward help and young prospects.
This would allow them to protect Suter and two more Dmen(I.e. Brodin and Spurgeon), having Reilly(ineligible), Olofsson(ineligible) and Folin to round out the Dcorp. Olofsson has the talent, it's all been about him being healthy.
The D would be a bit thin compared to recent years, but still decent in terms of the NHL and I'm sure trading Scandella and Dumba would net not only some forward talent, but also a young, draft ineligible D asset of note.
Depending on Pominville's status at the draft... still not sure if he is draft eligible... The Wild will go into the draft under this scenario being able to protect most of their good young forwards.