A suggestion for lightning coil improvement

Hey GGG,
I'm playing along with the new lightning coil unique this league and having a blast.
As a player, I'm really into non-meta builds so I'm trying to build around the Valako's Charge skill for clear. I had some cool ideas but it all fall down by the fact that you want to get as much as possible self lightning damage but you also want to survive it. This really limits the build and make it difficult to create.
I think that a better solution is to make it similar to the iron ward skill. Instead of damage taken, make it damage prevented. It will still require high investment in self damage but also in mitigation, creating a decision point of choosing to scale the self damage itself or the mitigation (tactician with 200% armour or witchhunter with sorcery ward and others).