Assuming you are a US Citizen then I think that transit through HKG would be far easier than DEL or PVG...

Clearly if you have time you should max out your miles on a DONE3 (max 17 segments by the way, not 16 as someone stated earlier) by doing something like a LHR-DXB-LHR mileage run in Europe and a couple of runs in Asia (HKG-KHI/DPS/CMB/NRT, depending on how easy you want it to be...)