I have been looking at the 4 continents fare with OneWorld and was thinking of using this next year in combination with an AAdvantage Platinum challenge. The info I can find is:

Valid for departures until further notice (prices are seasonal)
* Travel is restricted to 4 continents only. Must be a minimum of 3 continents including the continent of origin. For travel involving Europe then the number of continents required is 4.
* Continents are defined as Europe and Middle East/Africa/Asia/South West Pacific/North America/South America
* Free flight segments within each continent are limited as follows: - Africa-4; Asia-4; Europe/Middle East-4*(conditions apply); North America-6; South America-4; South West Pacific-4
* This fare is valid on the services of Qantas / BA / American Airlines / Cathay Pacific / Finair/Iberia / Aer Lingus / Lan Chile / Lan Peru
* All travel must be in accordance with routing restrictions.
* Travel must be to/from adjacent continents and in a continuous forward direction. Backtracking within continents is permitted with some exceptions
* Minimum stay is 10 days, maximum stay is 1 year
* Child fare is 75% and infant fare is 10% of the applicable adult fare
* Further routing and stopover restrictions apply
* Prices are subject to additional mandatory airport and government taxes as shown. Taxes are subject to change.
* Booking, change and cancellation conditions apply
* Subject to availability
* Note:-prices are correct at time of issue and subject to change, cancellation or withdrawal without notice
* Insurance is not included and is strongly recommended
* Please ensure you are fully aware of all passport and visa requirements for your entire journey

The routing I am looking at is:

SYD - NRT (direct) | QF | 4846
NRT - SIN (via HKG) | CX | 3429
SIN - HKG (direct) | CX | 1587
HKG - BKK (direct) | AY | 1047
BKK - DUB (via LHR) | BA + EI | 5940
DUB - IST (via LHR) | EI + BA | 279 + 1564
IST - LHR (direct) | BA | 1564
LHR - CAI (direct) | BA | 2196
CAI - IAD (via LHR) | BA + AA | 2196 + 3676
IAD - HNL | AA | 4817
HNL - MIA | AA | 4862
MIA - ANC | AA | 4004
ANC - MSP | AA | 2518
MSP - SFO | AA | 1589
SFO - SYD | QF | 7416

Total Mileage: 56530

or SYD-PER-AKL-NRT in place of first leg (+5990 total miles)

My questions are:

Is this a legal routing?
What fare class are these in?

SYD, HKG, LHR, IAD, MSP and SFO are fixed (friends and family visits) but the rest are for interest and Mileage.... any suggestions would be good.

Thanks.