Diane's first co-ordinates were presumably the ones fed to her by the FBI. So the FBI knew it was a place of electricity and that Mr C would go there, in the hope of tricking and killing him? I think it's safe to say that.

What I don't quite get is Diane's reaction to the 'smiley' message and the new co-ordinates. Part of her knew it was a trap, so what are the new co-ordinates and where are they from/for? Maybe as a tulpa she has a split personality and that was real Diane vs manufactured Diane.

I think I have some clarity, though. I'm sure it was a trick to kill/trap Mr C and he was privvy to it, hence sending Richard. Therefore I think it'll take something big and electrical to finally end him. Someone mentioned Frankie's glove causing more damage than a simple blow, perhaps those punches are electrical(?). That would be a bit lame, mind.