Recently read this post by u/Inevitable_Spring928 which mentions at the end a potential super tanky build utilizing eternal damnation, loreweave, and transcendence in order to reach some insane mitigation numbers. I decided to go Pathfinder to abuse taste of hate and increased flask effect stacking, and ended up with this POB template: https://pastebin.com/vffac4dZ

This has 100% physical damage taken as elemental with guaranteed 100% taste of hate uptime. Needs some weird niche items like an influenced helmet with an elevated phys to elemental mod, phys to elemental corrupt dawnbreaker, and a double purity of elements watcher's eye, but I don't think anything here is too hard to craft or buy on trade, and the payoff is ~190k hit pool with no temporary flasks or skills up plus some pretty crazy max hit values. Leaves you with ~30 points to spend on damage, plus the only required ascendancy point is Nature's Boon for taste of hate uptime. Not really sure what skills to build into from here, but if you take this template and make a cool build with it please share!