I managed to pull off similar (with 2A,1C) without status. Booked mid last year for December/Jan.
SYD/SFO/LHR/FRA(-NRT)/HND.
Hardest part will be in and out of Aus. (Plenty of wisdom in this thread about positioning flights if that's an option for you.)
When I was searching: Was loads of availability trans-atlantic. Similar with Europe to Japan. Ended up sucking it up in Economy for the first leg (SYD-SFO). And lucked upon a big CR drop a couple months after the initial booking that bumped HND-SYD into J.
Lots of planning and searching. Maybe like 100+ hours all up between research, searching, and calls.
If you're happy to spend the time and hope for big seat drops, then it's worth it, but you should definitely be prepared to compromise on at least one leg...