First of all, I am really happy there is a finally lightning spell based set in the game. I wanted to try it on a lightning blast character as I wanted to build an intelligence stacking zappy boy of death. Sure it has a prefix that favors trying our lighning Meteors but other spells work fine too. While it is enjoyable it can certainly have improvement / changes as it falls a bit short (not getting an offhand hurts a lot). Good rolls on 1h weapons and helmets far outstrips what the shock duration, chance and spell damage per int brings from what I tested. My suggestion would be to make it a 3 part set : 1h scepter, helmet and off hand. It would make it a bit more viable for other ligtning spells other than Meteor.
The 3rd piece could have some stuff like 0.5% shock effectiveness per 1 int and to feel like a real Stormcaller maybe the 3rd set bonus would be something similar to the Lighning strike from the storm caller. So a % chance to have a bolt strike enemies on lightning hit (while shocked maybe?).
If anyone has suggestions feel free to discuss it, maybe this set is acutally really good and I just don’t know how to use it.