PoE 3.22 Ancestor Arc builds

Path of Building question... as I scrolled past the "Precision" notable on the skill tree I noticed a huge bump in DPS which caught my eye. Was a bit surprised though because I am playing as a manabond hiero with cyclone + arc, so really spell based. I don't recall global accuracy being meaningful to spells. This notable plus the minor before give +10% cast speed as well but was skeptical that addition would result in \~13M+ additional damage. From what I can tell the trigger rate for manabond increases resulting in the higher dps. As a comparable test I added +10% cast speed on a dummy tes

ailments: purity of elements or helmet reduced ignite dura + pantheon + charge mastery for shock stun: perfectionist cluster + 2x brutal restraint, perfectionist + chest craft but its a prefix, cyclone alt qual + pantheon, eva mastery + pantheon phys dmg: shield corrupt, ? mana: clarity + watchers, leech anoint or auxium leech, -cost on gear additional curse is huge, pick from tree, anathema, precursors