While I do not mean to deride your proposed World itinerary, I have been searching for three years for a share for a Tahitian Princess cruise, r/t Papeete, either Cook or Marquesas itineraries.
I realize that my desire is not compatible with yours, but I offer it as something for you to consider.
And that is not to say that I am NOT interested in your World itinerary. I would just have to do more looking before I can commment intelligently.
I invite your interest and proposals.