Hi everyone
I am finishing a DONE4 that I started ex Khartoum. I have 3 segments left from HKG(and no stopovers left in Europe - so these flights connect the same day). My last stopover was in HKG so I need to start there.

I am ending in UAE rather than Sudan under the exception - the exception doesn't seem to apply to Amman otherwise I could do HKG-TOK-DEL-AMMAN. It seems that the only choices I have are CX or JAL. BA would be an option but I expect the taxes will be enormous?

At present I have following flights:

CX 289 Hong Kong (HKG) - Frankfurt (FRA)
airberlin AB 6562 Frankfurt (FRA) - Berlin (TXL)
airberlin AB 7494 Berlin (TXL) - Abu Dhabi (AUH)

I then have to make my own way to London. At the time I chose this to maximise mileage but now it seems an expensive waste of 3 segments.

Questions:
1. I notice that AA.com shows $971 in "taxes and fees" for the above flights ("Taxes & Fees Adult $971.74"). This seems quite a lot. If I choose flights with lower taxes, would I get refund of taxes already paid?

2. If the answer to the above is yes, please could some one suggest a more efficient itinerary. Should I be using JAL rather than CX

Grateful for any suggestions from the experts - as always
Joe