Not sure if you're asking for advice, or just indicating your future travel plans? If the former, then I'd suggest providing more info about your specific questions, prospective travel dates, your status - if any - with either airline and your flexibility in terms of routing etc.
How many points in each?
What have you found when looking?
Travel when?
One way?
Business class awards Canada-US <--> AU have been hard to get for a long. Also look for BNE and MEL as an alternative to SYD
SQ Krisfler is Star Alliance, so AC UA, NZ and others, But little hope with AirNZ
QF ffp is oneworld so QF, AA, FJ, AS, HA and others
HNL is about 1/3 of the way so KrisFlyer points to HNL an then QF points an option
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