Changing self cast to totem build ( need help )

Hello everyone !

So i am running onlyjb's build ( https://www.pathofexile.com/forum/view-thread/1880210 ) and just doing fine.

I love ball lightning, and i love much more a Sire of Shards due to it's amazing AoE which i like so much. SO i had the idea to use totems and sire of shards to reach a great AoE and make my friends get insta dc cuz their pc's can't handle it lol

I want to run onlyjb's build, but converting the self cast way he goes to a totem way i want to go.

So my question is.. how ?

I'm using a 5l sire of shards, a soul mantle to get 1 more totem and a choir of the storms. The rest of my gear are rare items. Making use of Inquisitor ascendancy and especially the Inevitable Jugdement node.

I'm running almost the same tree as he does, but idk how to improve my totems dmg since i'm not too much familiar with the uniques and their mechanics.

What i could see is that using a 5l sire of shards and 3 totems gives me more dmg than self casting using tabula and 2x singularities ( currently lv 71 ).

5l Sire of shards, 3 totems and 5 power charges : 3,1k x4 ( 4 ticks per ball ) = 12400 x3 = 37200
Tabula Rasa, self cast and 5 power charges : 7,8k x4 = 31200

I really want to make a try using sire of shards.. maybe it won't do endgame content but i want to try it out.

How can i improve that build running totems ? ( which uniques or mechanics would fit better )

Thank you !