He has actual 20+ goal, 40+ point seasons on his resume. I'm sure that a few of those required some skill.
Stewie also had a couple of 28g seasons, yet he's a 4th liner here. Ennis's best years were under Lindy Ruff and his all offense, and defense optional philosophy. He's a lesser skilled Vanek.
Ennis is useful on the PP, but he'll have a hard time beating out: Coyle, Granny, Koivu, Nino, Parise, and Staal (imo).
He's just an odd fit for the Wild:
-smaller perimeter player
-can score
-no defense
-health questions
-not a good passer
-handles the puck well, but will hold it too long
-not afraid of playing a physical game
-even, but not an improvement at anything compared to: Koivu, Staal, Granny, Zucker, Nino, Coyle, Parise (last year version), and maybe Cullen.