Hi all.
So I've priced up a DONE5 Oneworld Explorer ticket (details below), and I have a question about the taxes and charges. The total is running at about 41% of the base fare, which is a bit higher than I'd have expected. On looking at the breakdown on AA.com (also copied below - the block of text is the various taxes, which totals about $450, which is fine), I can see that $1,508.70 of the total of $1,961.19 is down as "Carrier-imposed fees". I don't have any more detail as to which carrier or which flight and the AA rep wouldn't send me any more details.
Would anyone have any idea or recommendations as to how I could potentially reduce these carrier fees (would anyone know which legs are driving the highest ones)? Sorry I'm not sure of the proper way of showing all the details on the below, so I've written it out underneath also for clarity. AA may have grouped them slightly differently as I was just booking them on dummy dates (e.g. grouped Chicago to Honolulu via Anchorage as one flight with a stopover) - not sure if that matters?
Thanks!

CAI(QR)-xDOH(QR)-xDFW(AA)-SCL, BAQ(AA)-xMIA(AA)-ORD(AS)-ANC(AS)-HNL(JL)-xHND(JL)-SYD(QF)-NAN, AKL(MH)-KUL(MH)-DEL(BA)-xLHR(BA)-AMM

Cairo to Santiago, transiting Doha and Dallas Fort Worth (Qatar flights on CAI-DOH and DOH-DFW; I asked to be put on American Airlines codeshare but they said they couldn't) (AA on DFW-SCL)
Surface segment to Barranquilla
Barranquilla to Chicago via Miami on American Airlines
Chicago to Anchorage on Alaskan
Anchorage to Honolulu on Alaskan
Honolulu to Sydney via Haneda on Japan Airlines
Sydney to Nadi on Qantas
Surface segment to Auckland
Auckland to Kuala Lumpur on Malaysian
Kuala Lumpur to Delhi on Malaysian
Delhi to Amman via Heathrow on British Airways

Adult (per passenger)
$4,700.00 USD
CARRIER-IMPOSED FEES$1,508.70 USD
PASSENGER FACILITY CHARGE (UNITED STATES)$9.00 USDSEGMENT TAX (UNITED STATES)$14.40 USDTRANSPORTATION TAX (UNITED STATES)$52.80 USDUS APHIS USER FEE (UNITED STATES)$7.66 USDUS CUSTOMS USER FEE (UNITED STATES)$13.04 USDUS FEDERAL INSPECTION FEE (UNITED STATES)$14.00 USDUS SECURITY FEE (UNITED STATES)$22.40 USDPASSENGER MOVEMENT CHARGE (AUSTRALIA)$40.50 USDPASSENGER SERVICE CHARGE (AUSTRALIA)$46.90 USDAIRPORT TAX (COLOMBIA)$49.00 USDDEPARTURE FEE (EGYPT)$1.60 USDDEVELOPMENT FEE (EGYPT)$9.70 USDEMBARKATION TAX (EGYPT)$25.00 USDSERVICE CHARGE AT CAIRO AIRPORT (EGYPT)$2.00 USDSOLIDARITY TAX (EGYPT)$13.00 USDPASSENGER SERVICE FACILITIES CHARGE (JAPAN)$10.90 USDBORDER CLEARANCE LEVY (NEW ZEALAND)$3.30 USDPASSENGER SECURITY CHARGE (NEW ZEALAND)$10.70 USDPASSENGER SERVICE CHARGE (NEW ZEALAND)$11.20 USDAIRPORT FEE (QATAR)$16.50 USDPASSENGER FACILITY CHARGE (QATAR)$16.50 USDPASSENGER SAFETY AND SECURITY FEE (QATAR)$2.70 USDPASSENGER SERVICE CHARGE (QATAR)$0.50 USDPASSENGER SERVICE CHARGE (UNITED KINGDOM)$53.20 USDOTHER TAXES & CARRIER-IMPOSED FEES$5.99 USD
Total$6,661.19 USD per person