We didn't beat anybody in the non-con last year, just like this year. Last year, we went 12-6 in conference, with three wins over top 10 teams in the country, and still got stuck in the 8/9 game. I don't think people realize how much having 6 games against Baylor/Mizzou/Kansas helped last season. So I'm not even sure we're safe at 11-7 this season, if those 11 are something along the lines of TCU/@TCU/TTU/@TTU/UT/@UT/WVU/OU/OSU/BU/KSU, because that's a pretty empty 11-7 with this conference, this season.
You're on the right track, as far as "empty wins."
I haven't assessed remainder of other Big 12 non-conference at this point, but it looks like nearly all the projected upper-division teams won't exceed expectations. So it's possible there will be fewer chances to snag the biggies like last season.
Precise record isn't important, but the way it's looking:
Assuming ISU manages to go 10-3 in non-conference, BYU ends up as a good win and the losses are "quality losses" or at least non-detrimental, we probably need:
Category 1: Split with KU, OSU, OU, BU, KSU
Category 2: Sweep at least WVU or UT
Category 3: Sweep TCU and Tech
Could trade sweep-for-sweep within category 1.
That would be 12-6 ... probably safe around that range.