Im at the end of the heatrow and some people give me a tip to buy a321nx BA contracts and it boosted me very much. Maybe you have same tips for me in Sidney.
basically the same as LHR. Get Closeby A21NX contracts and build up those contracts. So buy the M gates terminals first before moving to the L/X gates.
You can also ask for player connection here on the forum or in the woa discord or phat’s discord. (although you can only get L and X, because no M planes can currently reach SYD from any player airport).
I would also sell the bad S and M planes you get from the free and or premium pass so you can buy more gates and handling equipment. Thus you can expand quicker.