[@Zadubadabu]As I said during the tech description, Sarmakth has more exotic technology yet overall it has about the same effectiveness.
Hypermatter weapons have some interesting features but at the end of the day they are about on par with what everyone else has.
As for infantry, they don't use them at all. Their human vassals may use human tactics like the Pekh'makth they are but the Sarmakth stays with their doctrine.
Their larger vehicles usually deploy small drones to get inside buildings and other places. Albeit it's generally just optimized for smaller scale massacres. The smallest kind of drones are nothing but intelligent bombs with blast just good enough to murder humans up close. Sarmakth aren't exactly the most upstanding [s]people[/s] aliens you can meet in combat.