OK....so I might be a little bored this evening and find myself turning to my vice....looking at flights (sad I know). I was also thinking about the cost of RTW tickets and looking at the Premium Fare deals and wondered about creating a DIY RTW fare. Looking at traveling in September this year I came up with this one:

LON - TUN (no OneWorld carrier - cheapest economy ticket I found �117.00 with AF or �341 in business with LH)

TUN-AMMx-BKKx-KUL - KTM - HKGx-SFO - MIAx-BOG - GRU - MADx-OPO - all in business for �3,805.00 all in and 1160 TPs (if using BAEC) (for about an extra �200.00 you could do Bogota to Iguasu with stop over and then Rio with stopover instead of Sao Paulo)

I tried to create as close an itinerary as possible on the RTW tool (admittedly starting and ending in Paris because trying to end an itinerary in Tunis is a PITA), and avoiding any BA flights so as not to inflate the price further, I got a fare of �6,815.00 (�7,660) - uses 12 sectors. I know we are not talking like for like - but just found it interesting. Wonder if there are any other clever options out there.

you can nest two good deals round trip to form 2 RTWs.
ie. fly QR say north america to bkk, and nested with another KTM usa.

This one was quite interesting:

LIS-DOHx-KTM-HKGx-SFO-MIAx-BOG-GRU-MADx-LIS-MADx-GRU-BOG-MIAx-SFO-HGKx-KTM/KTM-DOHx-LIS - effectively giving you stopovers in Lisbon/Katmandu/San Francisco/Bogota/Sao Paulo both ways - �5,638.00 and 1,920 TPs

OR

JFK-NRT-BKK-KULx-KTM-DOHx-JFK-DOHx-KTM-KULx-BKK-NRTx-JFK - effectively giving you stopovers in NYC/Tokyo/Bangkok/Katmandu - �4,530.00 and 1,560.00 TPs