Geno has trained the team from day one and uses his "secret formula" to prepare them for the last three games of the tourney. Part of that system is --every starter could go 40 minutes. Yes, Geno has stated that he would play his starters for 40 each and Stewie would take every shot if that was necessary to win. Let's start with that premise.
Nevertheless, Gabby will be the designated relief player and "starter in disguise." Gabby will come in for whomever is not producing at Geno's expectations. My guess is Lou first. Then probably Nurse (who would be playing like a whirlwind as usual.) Lou pops over to the two guard when Nurse is out. Finally, maybe Tuck gets a quick rest if necessary. Gabby is the super sub who can come in for any of those three. If those 3 starters really needed some rest then Gabby could give them 10 minutes each. That would give UConn 4 players with 30 minutes each. We don't have to think about Stewie or Mo because they are going the full 40 minutes in the last three games.
Of course, if any other situation pops up then Collier could cover for a short time and Chong could pop in too. Don't see anyone else doing Crunch Time. Would not surprise me in the least if Geno uses the 6 man rotation for last three games.
A side note - Baylor's bigs are slow. Yes, they rotate when they get tired. In reality, they get tired after 5 minutes in the beginning, after three minutes in the middle and after a minute at the end. As a track coach I know how the "point of diminishing returns" works when one gets tired. With the bigs, it can get ugly very fast!! One more point, when their energy is depleted---the energy usually does not come back for the bigs. Just sayin!
Geno probably thinks---I have the best team (5 players on the floor) why not play them all game. For some reason, this still perplexes most coaches.