Have you downloaded the rules?
OW
https://www.oneworld.com/world-travel
FAQ
Read on for Round The World rules and conditions [Note: Links open PDF in browser]:
one World Explorer
Global Explorer
Circle Pacific
You only have 12 segments, and some of those are short (MAN, HBA). Not the most efficient for a DONE4. Or a AONE4?
A map from the Great Circle Mapper - Great Circle Mapper