As I go down to my
FLGS and peruse the new Grey Knight Codex, I realise that every grey knight unit has access to one or more psychic ability. Now I know fluff wise,
GK are all psyker marines but any entire army of psykers is pretty scare stuff. I begin to wonder what other codices can field 60 percent or more units that are psykers. Or what other codices has more then 2 units that are able to create a psychic defence to deter these psychic powers?
Before people say that Eldar was/is the psyker army of
40K, if you look through the codex not every unit can have a psyker in it. Also psychic defence seems to far and few or none at all (I am looking at you Ork, Tau and Dark Eldar

) in other codicies. My question then is with the lack of hoods, shadow of the warp or psychic defence how does one negate or at least limit an all psyker army?