Hi all, really hoping you can help.

I am a UK citizen based in New York and recently left my job so have lots of time on my hands (for the next couple of months). I would very much like to visit Bali, Hong Kong, and Auckland (it that order) to see friends and family.
Pricing as a multi-city on OW airlines is showing $17k, pricing a DONE4 is showing about $11k. I have two questions:

1) is it possible to do a DONE3 visiting these locations, in the order above? the OW Explorer engine won't let me fly 'back' from Auckland via e.g. Delhi, saying this constitutes 2 Pacific crossings, even though Delhi-> NYC will travel over Europe

2) given how much time I have on my hands, is there a way to significantly save money, by potentially amending/adding to my routing?

Not that it'll make a difference, but I am a OWE. Thank you in advance for your words of wisdom!