You can increase your TP's more if you stop in BKK between HKG and AMM.
I actually had business in BKK as well as HKG so ended up with 520 TP's on the round trip from LHR to HKG.

Service is great. Seats are not flat bed but inclined. Lounge at AMM is good.

There is the stopover at BKK on the way. Going to HKG once they let us out into the airport at BKK for half an hour. That was just enough time to go to the BA lounge and get a quick shower, coffee and newspapers.

RJ do actually do a nice brewed coffee on board and on demand.

Their J price is very cheap which is occasionally matched (almost) by CX. But you won't get as many TP's on CX.