Crazy Rasberry Ants are an absolute nightmare to get rid of. I wish I had the solution.
To the best of my knowledge the only ants in an ant-collony producing female hormones are the queens. If this is the case then one would think that a poison or sterilisation agent could be developed that uses these hormones to attack only the queens. I imagine that this could be by using such hormones to activate the agent or to build up an effective quantity of the agent in the queens. Such an agent would have no effect on normal, “male” ants, who would carry the agent to the queens with impunity. Furthermore, if such an agent could be made bio-degradeable then its use could be seasonally adjusted to minimise the damage to other species and the environment.