PoE Champion, League Starter, Cold 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:

Leveling 1-12 (still probably best way to level) Splitting Steel, Chance to Bleed Leveling 12+ Sunder until Boneshatter SWAP NOTABLE 3.21 CHANGES -determination reservation gone, this requires us to grab a mana mastery - which is relevry, this has 10% aura effect for our Pride aura as well. OR USE ARROGANCE PRECISION INSTEAD -new 1% max res armour mastery with armour on all gear (hybrid armor/eva is the gear we're aiming for anyways for suppression) -suppression mastery moved to evasion mastery and requires at least a hybrid chest on (this build already ran hybrid EVA/ARM for supp

DISCLAIMER: I have not actually played this build in any way yet and 3.18 is when I'll possibly try it, so it could have periods of build progress where its shit before it becomes good, or just be shit forever. DISCLAIMER 2: This is NOT intended to be a day 1 all uber bosses killed build with all magic gear like DD, but one that can function early without needing gear in SSF but will also feel rewarding to build it up as you play throughout the league. Build Features Ethics Not DD, Seismic, EA +++ Hit based attack build +++ Does not use omniscience +++ Does not use Ashes of Stars ++ Does not