No way Detroit gives that up for Fowler.

I would argue that is probably a slight over payment on the Ducks part. Red Wings have wingers and Ducks have defense. Fowler and a third for Tatar is fair and I'd prefer to keep Montour over Mantha, but he isn't going to hop Theodore on the depth chart.

Montour had more points as a defensemen than Mantha did in each of their best years in the AHL.
Montour: 12 goals, 45 assists (57 points) in 68 games
Mantha; 15 goals, 18 assists (33 points) in 62 games

Montour is ready to be tested in the NHL, but no room for him on the Ducks. They need help on the wing.

That is not quite accurate. Mantha had 45 points in 60 games this last season. He has played 2 years in the AHL while Montour has only played 1. Still, Montour has out produced him as a defensemen. I do agree that I think the Ducks are over paying in this situation because of Montour being included. I'd say Montour for Mantha is probably a wash value wise but I think Fowler is worth more than Tatar and a 3rd. Not to mention Mantha is expected to start the year in the AHL again from what I've heard.