What kind of defensive coordinator would "Mangenious" be for 49ers?

Daily 49ers blog for NBC Bay Area website: Eric Mangini has been dubbed "Mangenious" for his football mind, but would he be a good fit as defensive coordinator with the 49ers? http://www.nbcbayarea.com/news/sports/Mangenious-Gives-49ers-Reasons-to-Consider-Him-as-Defensive-Coordinator-289452441.html