That's a tricky question
We play both teams twice, so in the end I'm not sure the outcome of that game will matter much with regards to the Gophers' final RPI. Generally speaking I prefer that the teams the Gophers beat do well. At this point that would mean rooting for OSU, even though we have another crack at both teams.
However, in terms of what's best for the Gophers in the event they end up on the bubble, I definitely want a Sparty win tonight. Gotta' figure MSU's a lock for the tourney. Sparty likely will be nowhere near the bubble.
But teams like Illinois, Michigan, Ohio State, Penn State, perhaps even Purdue (if they falter). ... those are the teams the Gophers most likely will be battling for a NCAA bid. I want the middle-tier Big 10 teams to pick up as few significant wins as possible in Big 10 play. Winning at Breslin would be huge for OSU. I'd prefer the Buckeyes not do that, especially since they already have wins over Butler, Miami and Notre Dame.