This trade is like an awful algebra equation. If the Wild are trading a 1st or Fiala it's going to be for a better player than Donskoi.How about Donskoi (50% retained) 1.95M UFA 2023 + Calgary 2022 4th for Minnesota 2022 1st?
Then at the draft Fiala for Minnesota 1st + Seattle 2022 3rd?
Get Donskoi at half off for the next 2 playoff runs and helps with the cap next season. Keep Fiala for this playoff run and then move him in the offseason when you most likely can't resign him. For Seattle they get a young offensively gifted player that they lack. Lose some on the defensive side with Donskoi going the other way but he doesn't seem to be a long term player while Fiala would be and they can afford to pay him on his next deal.