I'm thinking they should grab a couple of Texas schools next. If you're going to exist primarily or exclusively west of the Mississippi, you have to be there. UTSA and North Texas make sense. Then if you can separate UNLV from Nevada (I've seen a few people say those 2 are intertwined like Cal and UCLA were because it's the same school system) snag them. That gets you to 9
I'd sit there for a bit. There's no one left that you can't grab anytime you want in the future. The other MWC schools don't bring anything. Then when the ACC breaks up, you can then grab Cal, Stanford, and SMU. The B1G and B12 could have already had them and passed, and I don't see any reason that changes. Especially with bigger, better ACC options available.
Still basically a G5 conference, but about as good as they can do IMO.
If I was the Mountain West, you need everybody. Grab UTEP and NMSU. Grab the Dakota schools. Montana too. The only way they survive is strength in numbers.