Wow, thanks for these fantastic replies mwenenzi and guv1976!
Reward flights can be from anywhere to anywhere, doesn't need to be ex AKL so that might make redemptions a bit easier.
I did not realise AA was an EY partner and if they do not have an AA-metal requirement that might be a decent option. Are there any sign up bonuses that you're aware of? I do have access to a US residential address (if being a US 'resident' makes a difference).