I would not include any game where neither opponent has much of a shot at the playoff.
Basically, one should just list the ten or so teams with a decent shot and then list the games they could plausibly lose.
Florida might be pretty good, but I don't think they have a realistic shot.  Auburn, nope.  Oregon, nope.  Miami, nope.
What about Washington?  Might they have a shot?  West Virginia?  Maybe not.