Originally Posted by
pandaperth
Welcome to the world of xONEx planning

Your itinerary,
HND-JFK-LAX-SEA-DOH-VIE-DOH-LHR//CDG-DOH-AKL-SYD-HKG-BKK-HND, is valid
It has
- 14 segments (the surface segment between LHR and CDG counts as one of the allowed 16 segments)
- Four flight segments in Europe (the maximum allowed)
- Two stopovers in Asia (the maximum allowed in your continent of origin)
You could use the remaining two segments to have more flights in Nth America (Alaska perhaps, or the Caribbean), or in the Southwest Pacific (Fiji perhaps)
Happy planning!
ETA allset2travel beat me too it - with some good ideas
You guys are a quick and expert

though even the original itinerary is a bit stretched for me, likely I will need to break it once I am back in Europe and travel back to HKG just to not leave home for too long away.
Did have a thought on ex-OSL but seems not worth the travel from Asia just to start the journey and seems a bit troublesome to get myself back to Europe somewhere in the middle of the itinerary