also, wasn’t the point of connecting their minds, to trick Rey into coming to him? finding luke from Rey was just a part 2 of the plan, not the whole plan. Rey was someone to be dealt with on her own based on her force use in TFA, snoke knew this.
Yeah, but why trick Rey to come to him, if he can send an armada to come to them, and get both Rey and Luke?
this is again your thinking though. no evidence that he knows where they are!