So basically, the one (ones) I don't want, work them up to a redeemable size, hit them and zero them on a award flight - then burn the card.
I'll probably have to keep QF as I believe there is some domestic flights that I will not be able to credit to international carriers. Then, work out which of the OW parteners best suite my international travel plans, along with the bells, whistles, lurks and perks that is on offer. It could be one of the two I've got, (or zero and dump them), stay solely with QF, or study up, and choose another airline.