Which NIT Regional is the Toughest?

When I first saw Mississippi State’s bracket, my first reaction was that a path of playing Nebraska, @ Baylor, and @ Louisville seemed like a brutal stretch and comparable to that of a NCAA Tournament stretch. I calculated the average KPI of all 4 regions to determine which region is indeed the toughest:

Notre Dame Region:

Average KPI: 100.5

This region features two KPI teams in the top 31 with Notre Dame and Penn State. Interestingly enough Penn State is the second highest rated team in this entire tournament and is a 4 seed in this region.