My theory is as follows, if there are 4 undefeated and/or one-loss teams, and no more, they will be in the playoff:
Win out (of course)
Root for Mississippi St. to win out. We know one SEC team will be in the playoffs, so it gains nothing for them to lose. Let them win out, so that Bama gets another loss. We need all the other SEC teams to have two or more losses. That eliminates the rest of the SEC if there are 1 loss teams elsewhere. Mississippi State will be #1.
Root for Notre Dame to lose one more, or Florida State to lose two. Since Notre Dame losing one is more likely, root for that. So Florida State will be #2.
Now, there are two spots remaining, for the PAC-12, B1G, and Big 12. Here are the teams that have a chance from those places: Oregon, Arizona State, Arizona, Utah, Michigan State, Us, Ohio State, TCU, Kansas State, Baylor
Arizona, Utah, and Arizona State have all yet to play each other, so at best only one will emerge with one loss. Utah plays Oregon. We need to root for Utah against Oregon, then have Arizona, Arizona State, and Utah cannibalize each other, and if there is a one-loss team in the Pac-12 title game, we need to root for them to lose, so that there are no one loss teams out of that conference.
TCU and Kansas State, if not eliminated this week, will face each other next week. So one of them will be eliminated. Baylor and Kansas State must also face each other. There is a chance, then, that TCU and Baylor, having already met, would both have just 1 loss. However, since they have no conference championship game, only the conference title winner moves on, if at all, I think. Either way, we need a two-loss team to win that conference if the Pac-12 produces a one-loss winner. So, out of the odds, it'd be either Oregon/TCU as #3.
If there are no other one loss conference champs, and Nebraska wins out, we come in at #4.