Go into the pit on mars, search the transporters, find their respawn spot, is almost in the center, they drop 45-60 Cryonite each, Save the interceptors until you have no repair left, Use Orbital Strike, and you get more cryonite there, they drop almost everytime (Transporters only), so, the cryo Drop % Rate doesnt matter
you can make 15-30k an hour there with just the Drone Cryonite Booster , no memberships or boosters
I have 450,000 Cryonite done there
Good Luck ^^