Battlemage Weapons Theorycrafting (Eternity Shroud Penance Brand example)

I was wondering if Battlemage would scale well into the endgame, and I think I found a shell that has a lot of potential. Eternity Shroud pairs well with Inquisitor's Inevitable Judgment ignoring all elemental resistances, and allows you to add a lot of flat elemental damage in many slots without worrying about penetration or curses. Seems to reach 280m damage from a 20 stack Penance Brand with temporary buffs like Divergent Berserk, but still 100+ m without. The items seem quite feasible to craft now with Harvest, although probably really hard next league. I also included non-physical versions of the weapons for pure elemental spells. Any thoughts on such an Inquisitor build or using such weapons for Inquisitors for physical or elemental spells?

Path of Building: https://pastebin.com/V8nPYZmi