The Buckeyes s/b ranked ahead of ND and Miami s/b ranked above Clemson, otherwise I agree with the latest playoff ranking.
The Buckeyes need the following to happen to take the #4 position by the end, and make the playoff:
1) Buckeyes must win out impressively - no signs of significant weakness.
2) Alabama, Miami and Oklahoma win out.
3) Wisconsin must beat Michigan this weekend.
That should do it, the Buckeyes will earn the 4th spot.