What makes you think the moderators have a plan for putting RMoney on the defense? I think RMoney has done that already! He's going into the debates as an underdog, because his strategy was to assume that everyone hates Obama, which actually is untrue. Only conservatives hate Obama and RMoney can't win without some moderates and progressive voters, even liberals.
RMoney has made very little to be his own man. He wants to merely be "not Obama," as if that's enough outside the conservative media echo chamber to win an election. It's not.