If you want to retain Diamond with OZ and want to recognized on the NZ portion of the trip, I would definitely pick the TPE-NRT-AKL although the routing seems to be serious backtracking and part of the journey is operated by CI.

For quality / entertainment / service, CX should be your choice.

If you want the fastest option (routing only, not taking into consideration connection time), TPE-BNE-AKL is the best.