I think you have a better chance of Hillary running as a third party candidate than her sitting on the bottom part of the presidential ticket.
Besides, interesting factoid, the last sitting VP to be elected president was George H.W. Bush. The last one before that, Martin Van Buren. History is not on her side. (and no I didn't know that it was a Final Jeopardy question).
Your positing an Obama/Clinton ticket. I agree, she’ll stay in the Senate, or run for Governor of New York, then try again before she’ll accept second place.
Notice, I suggested that a Clinton/Obama ticket would be the only ‘failure mode’ for Operation Chaos, before suggesting that even with Obama in the number 2 spot a lot of his supporters would be too angry to support the ticket.