OW lounges in AKL (I've been looking for an upcoming trip in Feb -- my first time so don't have reviews as of yet):

Cathay uses the Air New Zealand Lounge

Plus there is a Qantas lounge (would be available to OWS/OWE on any OW airline).

Hope this can help -- remember it is easy to look up for yourself on the OW lounge webpage (just wish they would make it into an app):

https://www.oneworld.com/ffp/lounge-access