Thanks for response. Does this itinerary look too complex?

syd-suv,suv-akl,akl-lax,lax-ord,ord-hnl,hnl-sfo,sfo-mia,mia-pos,pos-jfk,jfk-hel,hel-mad,mad-cai,cai-lhr,lhr-bom,bom-hkg,hkg-bkk,bkk-sin,sin-per,per-syd

I have avoided HKG to begin with. I reckon many of the US flights may be CX or QF code-share.

Look forward to further comments.