I made a tower with a lightning rod, but neither THDR nor LIGH are attracted to conductors. Maybe add that, for realism?
Xetalim, Great idea! Even if it causes lag, its optional! Also, its hard to make massive amounts of lightning without CLNE, and its your fault if you did that in the first place.
I know it doesn't do it at the moment, however, i think that it could be implemented, or reimplemented if what jacob1 says is right.
EDIT: Thought you were talking about TPT, but i know it doesnt go towards metals and conductors exclusively. Lightning will go to the closest object to it, like a tree, or a metal lightning rod on the top of a tower. In TPT, i personally think that it should go to the closest conductor within a set range, just because of how the game works.