I am trying to explore something ex-OSL and came up with the below (not much creativity) and not quite sure if still valid though just 15sectors.
Called CX, read out all the flights I wished and the agent just booked to flights I wished and looked all the way D availability is good. The agent mentioned it might violate the rules but the booking still gets created and passed to "backend" team for checks (assume the actual routing check and pricing only happen here?)
read the rules once again and the routing looks pretty legit but CX can't price it out straight so I am keeping my fingers crossed. Did anyone get recent experience to share?

OSL-xDOH-AKL-xSYD-HKG-xSIN-HND-BKK-HND-xDFW-xJFK-LAX-DOH-DUB-xDOH-OSL

called AA RTW but insisted AA code over the water segment so didn't go all the way through