PoE Sniper's Mark, Champion, Lightning builds

Hi all, I league started with Champion Elemental Hit and took it as far as I could go with the limited knowledge I have with crafting and mechanics. I went with lightning conversion and Doryani's prototype as well as Quill Rain which has been great but the damage has now fallen off quite a bit and I was wondering if there something I can do to make this build go any farther so any suggestions would be greatly appreciated! Thanks so much! POB:

I was planning on going lightning arrow champion when I saw this post on r/PathOfExileBuilds, In the comments I saw this question from d2WarlockNeedsLove asking if Voidbringer could be used to prevent Lightpoacher from triggering the skill and consuming spirit charges\\:\\ [

I'd like to introduce a tanky alternative to the traditional TS Deadeye.As with deadeye, you don't want to start TS, this applies to Champion as well. You start off with LA/IS/Galvanic/... or RoA for phys then switch when you think TS won't suck (+2 arrows bare minimum, likely even later). This isn't a full guide, just PoBs with variations of skilltrees/gems, so if you need handholding this isn't the place. The +2 proj on the tree prompted the builds, as I previously enjoyed a phys Impale champion back in... I honestly don't even remember, the character is gone too, so... Disclaimer: Built

Elemental Hit Ballista Champion with Wilma's was my favourite build of Sanctum (SSF btw) and it gets massive buffs for 3.21: ~~Reliable "covered in ash" via Xoph's Blood buffs~~ \+2 Proj from tree 100% increased Damage with Hits against Ignited Enemies Transfer Mark Mastery \+1 max all res (from Reservation Mastery) The character had around 8m shaper dps and manages to hit 13.5m shaper dps with changes (if 3.21 dev pob is correct). ~~3.21 pob:~~ ~~ 3.20 pob

a champion sparker POB: