Travel agent in GIB that is very familiar with OWE ticketing (although the agent that did most of the work historically moved on last year - but they still know their stuff.) http://www.blands.gi/

Itinerary looks fine. You might think about SFO (QF) YVR - LHR if the timing is okay. Remember too that all the Caribbean routes (LAX-SJU-BGI-JFK) are operated with J but no F (Y only on SJU-BGI) so count tier points accordingly.