looking at booking DRW-SYD. If I select 1 Passenger on the QF Website I get a price of $299. When I select 2 Passengers I get $419 pP.

I understand that it won't let me book two passengers on one ticket in different booking classes but how best handle this without spending an extra $119? Book one ticket at the lower price and then the second one at whatever price comes up, I am assuming it would be $419 as I can select 10 seats at that price? Downside is I will end up with two different PNRs which is less than ideal for upgrades or in case of flight changes. Any ideas?

Thanks!