As long as the attention stays on them, and folks are choosing either Cruz or Paul, we can end up with a Cruz/Paul or Paul/Cruz ticket. That's much better than letting a RINO gain traction.
As far as the rifts they have? I'd say they complement each other and together they can solve a lot of problems.
With either Cruz or Paul or Palin at the top of the ticket you will need a “moderate” as VP to expand the voters pool to get elected. Yeah that sucks, but Cruz/Christie, Paul/Bush, Palin/Ryan or something like that is what it will take to win. Notice also that there is a state governor on each ticket. Voters like state governors, they have executive experiences and a track record of the same.