Can anyone tell me if this route is feasible on Global Explorer (34,000 Miles Ticket)

LHR-ALY-ADD-JIB-NBO-BAH-DEL-SIN-SYD-AKL-PPT-IPC-SCL-UIO-MIA-CUN-LHR

London-Alexandria (British Mediterranean)
Alexandria-Addis Ababa (British Mediterranean)
Addis Ababa-Djibouti (Surface)
Djibouti-Nairobi (Regional Air (BA Franchise))
Nairobi- Delhi (via Bahrain)(Gulf Air)
Delhi-Singapore (Surface)
Singapore-Sydney (Quantas)
Sydney-Auckland (Quantas)
Auckland-Tahiti (Air Tahiti Nui?)
Tahiti-Easter Island (Lan Chile)
Easter Island-Santiago (Lan Chile)
Santiago-Quito (Lan Chile)
Quito-Cancun (via Miami) (Lan Chile/American Airlines)
Cancun-London (British Airways)

I also have a couple of questions with the rules for the Global Explorer Ticket.

1) How is Surface mileage Calculated? Is it between two points or on Global Explorer Network? Eg No one flies Addis Ababa - Djibouti. Would Delhi-Singapore surface be calculated as Delhi-Hong Kong-Singapore (Cathay Pacific)?

2) Does American Airlines (or anyone else other than LanChile) fly from South America - Central America.

3) Is travelling Africa - India (via Bahrain) counted as backtracking through Europe (even though there would be no stop)

4) Would a similar trip be possible on OneWorld Explorer?

Many Thanks

Andrew