Given that this thread is 8 years old I thought it best to ask again.
I'm thinking of doing a TPE-HKG-CGK-HKG-TPE BA tier point run based on a CX weekend business saver sale (it's doable in one tough day). Are there any recent experiences with regards to getting both HKG - CGK - HKG boarding passes beforehand so as to do a transfer in CGK only? It saves a fair bit of immigration hassle and the departure tax.
Also, I noticed there are a mix of planes flying the above itinerary (744, 774, 777, 340 etc.) Are there any better choices with regards to seats or is it all regional business and not very interesting in any case?