V-Flyer

The wife and I are looking to book a flight in November LHR-LAX-AKL-LHR in PE and we are trying to earn as many miles as possible, whilst trying to book through VA it says we will earn 13,396 miles plus the miles earned with the Partner (Air NZ) who's earning rate for PE is 150% of the miles flown.
I have checked Air NZ's website and can find no information on what I would earn with them, would it be more beneficial from a miles point of view to book all the way with Air NZ?

Any help would be appreciated, Thanks.
Dominic