Agree with the comment above re DONE4 vs AONE4. You are unlikely to get value (unless its not your money).

What are your aims
• Visit the places listed (and not others)?
• Maximise miles?
• Maximise SC to the QFF program?
• Minimum time in aircraft ?

By having the break (separate ticket) , I assume this trip will be done over several months (12 month's max)

A few points to consider
• DONE4's are cheaper in NZ than Aust. Worth taking a BNE-AKL flight if you want to save a few $
• Ticketing on AA is cheaper than QF (less fuel surcharges). Plenty of comments about this on the QF forum and Aust Fequentflyer
• You could purchase in Asia (DONE3) and do a basic BNE-Asia - BNE flight at the start & end
• You will get more miles on the AA frequent Flyer program. (better earn to burn rates)

You can travel in any direction in a continent. eg SYD-JFK-LAX-DFW. Except for SWP, more or less than 24 hours only makes a difference in some airport taxes. You are limited to 2 stopovers & 4 flights in Aust. You have a maximum of 20 segments.

Have a look in the Oneworld forum. You will get more suggestions in OneWorld