These two don't compute you know? Last year Dougie after the 15 games was better in all three zones than Dumba. This year Dumba has improved a lot defensively, but that's under Brodreau, so trading for Dumba is stupid. Brodin I'd definitely trade for. I'd love this lineup:
Giordano-Brodie
Jokipakka-Brodin
Kulak-Engelland (With the way these two have played, they'll be the best 3rd pairing in the league behind Edmundson-Parayko/Shattenkirk).
So two bros in the top 4.
Dumba is definitely improving defensively, but his forte is offense, not being a lockdown defender.
While it's true that the Wild might look to trading a Dman due to the emergence of Folin, the probable emergence of Reilly, and Olofsson down in the AHL , it is highly unlikely that they trade one for another Dman, especially one that is overpaid and underperforming. Wild need forwards, not defense, and especially not expensive ones that are draft elegible.
If they wanted another Dman they would've gone after Trouba.
To sum up, the odds of the Wild trading Brodin, Spurgeon, Dumba, or Scandella for another Dman, especially a draft eligible Dman whose cap hit is 5.75M, are slim and none. Simply not a need.