It's going to be in C-class, but I found out I could more easily solve it by gettign the sidetrip orginated in BKK than DXB, which leaves me with more miles to squander on my RTW
Currently I'm needing to pass through LHR, PDX, BNE, SIN and PEK on my trip in that order, and I'm trying to fit in what I need on that trip, currently I'm trying to fit it all in whilst corssing the pacific on NH to get a taste of their services.
The sidetrip is to JRO (and hen into the bush), and Ethiopian flies BKK-ADD-JRO for about 800GBP in D-class and I'm not expecting first class service it will get me a comfy chair; according to amadeus Ethiopian are flying both 764's and 73W's so they must have a lot of new equipement