i've booked dozens of mini-RTWs over the past few years, but would booking these sought-after flights be worth getting an assist from a travel rewards site?

We were thinking of doing a mini-RTW, but if it simplifies things, we're fine doing a round-trip and then use Australia or New Zealand to go onwards to SE Asia.

Due to our work schedules, my friend and I can only go in July or August 2021 (we can travel parts of one month and into the other).

Hoping for at least F for the 2 of us in the 380 inbound/outbound, and then F in the 787-9/10 or 77W is fine for the other leg.