You beat Marquette and say you beat Providence/Marquette round 2 and that should be enough. Win the season series against both those teams and we should be BE team #4 for the NCAA Tourney.
Any other wins after those is to boost seeding or to get us out of the play in.
Lose to MQ and then you need to at least reach the BE Tourney game, and hope you knocked off either Creighton or Villanova on the way to that title game.