PoE Pathfinder, Lightning builds with custom stat filters

I liked the look of the Mahuxotl's lightning strike characters, but I love the speed and clear of KB/power siphon builds. So I drafted this up as a tanky clear speed wander: The idea is to abuse split projectiles and returning projectiles to ramp poison damage, and trigger flask charge on crit to sustain Dying sun. Looking for advice on how to push damage without sacrificing too much tank? Any other cool synergies along with sniper's mark + returning projectiles I should know?

So, i managed to get my hands on Hateforge and thought id try to get it going like back in Ultimatum. PoB: Very unoptimized and still low level, not meant to be more than a proof of concept for now. The main idea is to use flask effect, reduced duration and dual wield the ultimatum weapon to get 100% uptime on VLS. Because the Sceptre has very low attack damage, im using covenant for big base damage. Its definitly way weaker than before but with how crazy attack speed will scale this, it might be possible to make it good again. Edit: Got a couple PMs tellin