I honestly don't get this mode. I've tried to play it over the last few games and every time it is just a monotonous boring chore.
Every moment takes too long, and god forbid if you mess up a moment it can make the Showdown boss incredibly difficult.
Worst of all however is that after the time sink of playing every moment and then the final boss if you don't win you get nothing. No Exp, No, PXP, No Credits, just a 'failed' message.
I feel that it would be massively improved if you could pay credits to retry moments, and you at least recieved something for what can be an hour of play even if you don't beat the final boss