hello leemarlon,
Layovers in Sydney, Melbourne and Brisbane are usually split with a shuttle to either Auckland or Christchuch. Sao Paolo only has one layover a week that is longer than 30 hours. They've also stopped the 4 day Seychelles, it's now a turnaround. Nairobi used to be a layover, but at the moment it's operating as a turnaround due to conflict there and should change back within the next few months. The 4 day Milan will be ending soon as well once it becomes direct daily.
As a general rule of thumb when the flying time is more than 4.5 hours then there will usually be a layover there.