Expect the best, obviously! Please review SEA-NRT, that is a new route that just got upgauged from a 787 and F added in. I don't think there's even a review out there. I'd expect caviar service and kaiseki meals (which you should do). In NRT, NH has their F "Suites" lounge.

For Thai, you will get Rimowa amenity kits I believe, one of the perks of flying their F. In BKK, make sure you get a complimentary massage and take advantage of their ground services.

For Singapore, make sure you "book the cook" for your flight ex-Singapore to Bali. I recommend the Lobster Thermidor. You might be able to get away with it for the SIN-BKK flight too, but I hear they are stopping people from being able to do that on that specific route. Unfortunately the best lounge in SIN you can get into is the SilverKris lounge, which is still excellent by international standards.

Asiana F also has caviar service and ICN-LAX is one of their flagship routes. The lounge in ICN is pretty average from what I've seen.

And of course, enjoy Air Canada rouge for your last flight from LAX