Im looking at a trip to Sydney early next year in Business and trying to work out the best route / tier point rules.

As far as i see it on OW there are the following options:
- BA: DUB-LHR LHR-SYD
- Qatar: DUB-DOH DOH-SYD
- Qantas: DUB-DXB DXB-SYD

Does anyone have any recommendations? Google suggests Qatar has the best product. Also a newbie question but can i book through Qatar and still have tier points credited to my BAEC account or do i need to book through BA?

Thanks