I have extensive experience in the travel industry and can certainly assist you with your request. Your preference for flights on Singapore Airlines and Qatar Airways is noted, and I will focus my research on those airlines. While your ideal scenario is to secure three business class seats, with the flexibility of one seat being on a different day, your priority is to obtain the most cost-effective point-cost seats. Specifically, you are interested in a business class flight from Sydney to Tokyo with Singapore Airlines and a business class flight from Sydney to London or any major European city with Qatar Airways. Your travel window is set to depart from Sydney on December 27, 2023, with a return trip scheduled two weeks after departure. It's worth mentioning that both airlines offer a range of point-cost seats, with Qatar Airways, for instance, varying from 180,000 to 360,000 points for a return business class seat to London. My research will be focused on identifying options at the lower end of this point scale to ensure you get the best value for your travel plans.