Info on future improvement paths to NV, TI, and smoke:
Standard smoke and dust can block night vision just as well as normal vision, but it takes rain, thick fog, and heavy dust to at least partially block thermal imaging.
Smokes using sulfur grenades and/or oil cracking dispensers alone are apparently almost completely transparent to the band of IR light that TI sensors detect.
Graphite-based obscurant added to cracked oil dispensers can be very effective against TI, but necessitate people in the cloud to wear respirators/masks.