Given that you're WP that potentially changes the equation given the potential (but time is not on your side and peak demand season) to release some reward seats (but J would be pretty difficult, Y probably doable - but then again you might as well go JQ direct in that case).
I would have guessed SIN to be no go, but thinking of other potential places - JQ to HKT etc - if you can get "Business" then that's doable for that kind of flight if not the most wonderful.
I suppose there's going to be a trade off between what you can get and is practical for BOTH of you vs what probably makes the most sense.
If the JL flying via Tokyo is in J, that changes the equation (I apologise, I thought that was Y reward pricing for two!). Certainly that option would appeal more given the relative comfort o the indirect route - vs JQ on the direct (and knowing you're WP, JQ makes far more sense than vietjet or Scott - I was thinking of lower cost either Y or J-ish(ScootBiz) products to compete with JQ). Being able to use WP benefits - at least in aus for lounging would be rather nice, and if going JL of course very helpful.
If SC earn is also potentially a desired benefit, then you'd want to get an SC earning JQ bundle of course (since reward flights won't give you any, unless QF metal and you're also PC/PC+). If this is a minor consideration of course then that again changes the pros and cons of the various options.
