Blunderbus
Two Capts and Two F/O's plus 48 hours in HKG on the 380.
Having been taken very very much by surprise by that comment I originally posted a "thanks for the correction", but I've just been off and done some checking - are you sure about that statement because where I looked I couldn't see any 4 pilot HKGs for the foreseeable future on either the 777 or the 380.
FWIW and for definite the 744, when it did the route, and nowadays 777 both have longer flight times on the sector than the 380 and they went down to 3 pilots a fair time ago.
In any event as you say the default slip was/is around 48 hours.
I will publicly apologise and wind my neck if you can show that BA schedules the 380 on the daily HKG with 4 pilots (and the occasional 1 extra perhaps due to training doesn't count).