I think NU is already in, even with a losing streak (though we'll be nervous that day and may have to play in Dayton). However, NU needs enough regular-season wins to get the double-bye for the Big Ten tournament, which means probably two more wins, especially as they have the tiebreaker over Indiana. Four of the five games (Iowa, Illinois, Maryland, and Rutgers) are against teams also in contention for the double-bye, so beating any of them (especially Iowa/Rutgers, who have the tiebreaker over NU already) would especially help them in BTT seeding.
I want them healthy and rested into the NCAAs and not hobbled from playing four games in four days or something .
Obviously, the preference is to win enough to pass Purdue in the standings, and then you know they'll have everything they need - double-bye, a high ranking, the regular-season crown, and then hopefully the BTT crown and a #3 seed in the NCAAs. Hell, if they end the season not on a six-game losing streak but instead on 12-game winning streak, I think you're then talking about a #2 seed. Dare to dream!