Also, what is the "DAMAGE" damage type?It's the 'special' damage type, used by a few specific weapons like sanity damage during certain missions, dog barks, Avatar 'tentacles', and a couple of others.
Their telekinetic stone throws or whatever it is deals kinetic damage, and not that much of it. Just wear liquidator armor or better and deduce their location by looking at where the shots come from. Klein bottle grenades have a very generous blast radius, and getting caught even on the very edge is deadly to ghosts because of their psi-damage vulnerability.
AI units are the best way, but you don't really need a laser tank. An outrunner or a large flying drone will suffice. They are not immune to throws, but they can survive them for a while.
I imagine that keeping great number of ghost stunned must be huge pain.