DONE4 MR CHECK Opinions Please

[GCD123]

I plan to do a DONE4 business trip/mileage run in July - ex South Africa. Your opinions would be appreciated. Oneworld Circle Trip Explorer :

SYD-JNB QF Using points award
JNB-LHR BA Commence DONE4 (I would prefer to start in Capetown, but scheduling does not allow)
LHR-MCT BA MR
MCT-LHR BA MR

LHR-MXP BA Business
STOP
MXP-LHR BA Business

LHR STOP
SIN MR QF A380
NRT MR
DEL MR
HKG MR
PER MR
STOP & USE DOMESTIC/NZ SEGMENTS AFTER SEPT 1 REQULIFYING DATE

BNE
MEL
AKL
SYD

JNB USE BEFORE JULY 2010 EXPIRY

Thanks GCD123