I find that booking six months out gives great options for award redemption. Booking towards the ‘end of the schedule’ around 11 months out is even better if you want to redeem for four or more seats. Right now there’s a great example of the theory from several of Cathay Pacific’s U.S. gateways.
Searching for two passengers is much easier of course but the ability to redeem a top flight business class product for four or more passengers is worth noting when availability is this good.