1. You need to find out if your points is permitted for code sharing flight especially the flight is NOT offered by ANA.What I was saying is that I want to use Amex Points to fly business class. ANA code shares with Philippines, so might be best to fly Philippines and book straight to TAG through ANA. ANA accepts Amex points. Otherwise, Cathay SFO to Hong Kong to Cebu would be other option.
2. You also need to find out if ANA can book you through to TAG.
I assumed you have checked with ANA or other airlines.
MNL - TAG by PAL : Twice daily: 08:55 and 14:05
With heavy load the last thing you want is unnecessary travelling.