Shanghai is a strong possibility to meet up with VS, same as MEL-DXB to do the same thing.
Cabin crew structure looks like an IFM (inflight manager), IFS (inflight supervisor) then IFC (inflight crew) very similar to QF long haul, on 5 year contracts (don't know how that will be possible when the IR lawws are scrapped). I'd say if the aircraft is utilised on SYD-PER then LAX layovers will be 24 hours max and not on the same turnaround schedule as QF 744s?
Just a thought.