I am relatively new to this forum which I discovered only very recently. I have certainly learnt some high value things from reading this forum over the last few days - much respect for the regulars on this forum and the advice and expertise they provide to several others on this forum.

I would certainly value some thoughts on a RTW trip I am planning for my family.

We live in London but happy to start the trip in Oslo. Key places we wish to visit are - Vietnam, Cambodia, Hong Kong, French Polynesia (I know OneWorld don’t fly here), Hawaii and Vancouver.

The flight routing I have come up with so far (and which the AA RTW desk has very helpfully validated) is:

OSL-DOHx-SGN-PNH//HAN-HKG-AKL-SYD-HNL-DFWx-YVR-LHR-DXB-LHRx-OSL

The current thinking is to buy separate tickets to take us from AKL to French Polynesia and back and then continue with the RTW ticket we would have.

A few questions I had where I would value input are:

1. Is there anyway to get closer to French Polynesia (PPT) using OneWorld airlines that are eligible for the RTW tickets? Or is my current plan to get as far as AKL and then use separate tickets the best plan?
2. Are there any sensible ways to optimise the earning of BA new tier points?
3. I am currently using up 14 segments - any interesting ideas of how I may use two additional segments so as to not “waste” them? I also feel that using the RTW ticket to fly SGN-PNH and also the surface leg from PNH-HAN is perhaps a bit wasteful. I’ll be travelling with two children so don’t really want to be doing long trips just to earn miles etc - but would value any thoughts on how I might get value from the remaining segments.
4. Does using a codeshare flight number (as opposed to the operators flight number) have any impact on the taxes/carrier imposed charges that are payable?

Thanks much in advance.