This is our planned (DONE4) route
OSL-xDOH-JFK-xLAX-SJO-xLAX-HNL-xNRT-SGN-xNRT-BLR-HKG-AKL-SYD-LON-xDOH-OSL
I assume there are no issues with a Singapore stopover with the SYD-LON flight (returning to Asia for a stopover)? As I understand the oneworld Explorer allows two intercontinental departure and arrivals.