Which airline status to go for next?

Just got lifetime platinum pro on American and curious about what people would go for next. I’m based out of NYC and a T2 city (Chicago, Miami, Dallas, Boston, etc), and travel to/from Asia (HK, SIN, Manila) in business class every 2-3 weeks for work.

I already have 1M+ Amex points (Plat), so was avoiding Delta b/c SkyPesos seem useless — maybe United? My experience with United to date has been nothing been horrible so have been avoiding them like the plague though. Thanks!