I'm not sure what's in the LA smoke, so as always YMMV.

For particulates, a half-mask respirator with P100 filters is the industrial-strength choice. Cartridges can be added for specific gases or a GME (gets most everything) cartridge can be used.

I am very happy with my MSA full-face respirator with P100s, FWIW, but that's because I get such a great seal with it.

Fit is everything. Not comfort fit, but a solid and reliable face seal. In industry, people go through a "fit test" with sophisticated monitoring equipment to find the size and type of respirator that really will protect them.

My two-cents' worth.