Cummins is the Vice Captain on paper and has the right to have first crack.If that's the case, and Smith isn't the answer, you've got two choices -
*Pick a captain from the existing team, and I can't see any viable choices apart from Smith, or
*Pick a captain who isn't good enough to actually be in the team, which is hardly ideal
In the meantime blood Carey to take over if Cummins can't do it.