You can book three 345k awards https://www.asiamiles.com/en/redeem-...ard-chart.html and then cancel them after miles expiry date.
This will extend the miles to the same expiry date next year.
Cancellation fees are US$120/12,000 AM per ticket (well, you will opt for the latter, won't you? Cancellation fees in miles can be taken from the refunds)

Difficulty is finding three RTW Award Zone 13 routings. Even if you weren't actually planning to travel on any of them.

Oh BTW LATAM has restored long-haul J availability (they were not showing earlier this year and late last year https://www.flyertalk.com/forum/lata...-ba-com-4.html ) but BA/QF/AM are all seeing different avaiability. With AM seeing the worst of the three (checked by phone).