I assume that you aren't suggesting that those three bigs should be on the floor at the same time, were you? Then who is our backcourt? Bria and KML? So Caroline, Tiff, and Kelly come off the bench? And who is quick enough to stop Odyssey Sims from driving unchecked to the hoop, and perhaps dishing to Griner?
If you are saying that the three bigs may have to take turns on Griner, I'm sure that is true. That is a case where Heather may be first off the bench rather than Kiah, because of her direct experience in doing the same job (very well) last year.
I think KML will be in the starting line-up by the Baylor game, probably replacing Kelly (sad to say). I was watching her (KML) play defense last night, and she is not afraid to mix it up. I would see her guarding Destiny Williams and hopefully neutralizing her on the boards. Because of the energy that will require, and because Baylor will make sure she is well guarded, I wouldn't expect KML to score more than 15 points against Baylor. And I don't think Stef will get to double digit points against Griner. The other points will have to come from Bria's and Caroline's jump shots, Tiffany's penetration, points off turnovers and transition points, and some back door plays as Baylor (particularly Sims) gets over-aggressive on defense.
I would expect to see a lot of drives right at Griner, to get her to foul. She did that several times against Notre Dame's penetration. But Griner will get 25-30 points. The key is preventing Sims from killing us on offense. If she can be contained (probably that will be Tiffany's job, with Kelly providing key minutes off the bench in the same role, and they both should be well suited for it), then UConn should win even with 30 from Griner.