What is the best option for premium cabins from Melbourne to Mumbai in Feb 2023?

have a trip Melbourne to Mumbai coming up in late Feb / March 23 can you advise what would be the best option for businesses/ first class fares 1 passenger

Are you after revenue fare (paid with $) or with airline points options? If it is the former, you could try Google Flights. If it is the latter, you could provide some more details on what sort of airline points you currently have access to.