How important is adds # to # lightning damage to spells in overall damage?

Lightning Conduit

Non-Crit Orb of Storms/Crackling Lance Elementalist Mapper build

[dslily] Lightning Conduit Elementalist guide 3.19

Shock Nova

Galvanic Conduit Slinger

Arc

Path of Exile 3.18 Death Wish Elementalist

Phantasmal Lightning Tendrils Elementalist - (almost)all content - also a brief treatise on what I think is wrong with channeling in PoE

[3.17] Death Wish (Maw of Mischief) Build | Elementalist | Archnemesis | Path of Exile 3.17

Penance brand elementalist SSF

[3.17] Armageddon Brand Build (League Starter) | Elementalist | Archnemesis | Path of Exile 3.17

Looking for some feedback on my level 90 Crackling Lance build in standard league

Crackling Lance