I know that Autodoc, sepressive fire, dust field gen etc do.. but how about tear gas? Would a room full of them deal high damage per second and make their defense basically 0?

I'm sure the damage from tear gas stacks, but the defense reduction is a percentage so there is probably a diminishing return there. Either way, I prefer a combo of tear gas, neurostun (so the monsters are in the room longer) and area of effect damage modules and tesla (if there are many anti-module monsters).

Yeah, that is what I usually do- but I was wondering for the armory pod. Trying to do an armory run, with pause disabled, trying to open every door, and never let the crystal get it. :P I'm thinking I'll just go for the poison module, pepper spray, and tear gas. Only options, but with them and neurostun, you do have a nice combination.