Honestly I haven’t tried it. But your description makes it sound like Bloody Pox a bit and I got frustrated on a certain build a while back because I kept mis-clicking.
I have suspected from the beginning that someone pulling the design strings equates being frustrating with being complex and challenging. That is unfortunate. I have come to anticipate that anything I think might be fun or cool to try will be met with a design restriction that makes it frustrating or impossible to implement. But still i play.
So if using Phantasmal Blades included as Caster, please count in this another “Just for Fun” build 
Grimtools : http://www.grimtools.com/calc/62aAyD24
Video :
Just for Fun Build - Aetherial + Chthonians
Just for Fun Build - Port Valbury Outskirts
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Speaking of the lightning abilities, do you know if the chain lightning on the empowered stormcaller gear is proc on hit or on being hit? It seems i have seen both listed in various places. If it is on being hit only i might have to rethink this build, it is getting harder and harder to increase damage and keep up the defense. I am having to give up the lightning procs, which is really where the stormcaller gear puts the modifiers, and the cold damage is stagnant with the icespike and ice weapons. Very unfortunate that lightning sphere is not an obtainable item spell and that the components are not more versatile. And, is there any component or augment that gives any mainhand electrocute damage? Seems there are items that give burn and poison but no electrocute.
Try some of the item skills with the pyromancer. I find those spam casters fun. There are plenty of skills for a chaos fire/build and the modifiers stack those skills up wonderfully. Taking the item skills leaves you able to dump more points into the modifier abilities. Demons breath particularly scales insanely with is high base chaos and fire damage. It only lacks a stun, which is why I find Greater Fireblast important, but really with enough modifier and some mainhand burn the lesser fire blast is just as good. Feels like a waste at times pushing damage so high for such a small mainhand return on the spell but its the modifier really that does the work.
The chain lightning on Empowered stormcaller’s spellblade is on-hit. Electrocute is extremely difficult to build around imo. Early game you can get Rain Caller powder from Homestead. Late game you can get Outcast’s Thunder from the Outcast. Both Hell’s Bane Ammo and Amber provide bonuses to Electrocute. The hardest part of Electrocute is stacking increased duration. There are very few sources which offer this.