This is my current pob: https://pobb.in/qwh4NaCXhvRx
Building around the OP SST crucible mod with conversion to cold and eternity shroud to add extra as chaos. Add Heatshiver into the mix for another insane damage multiplier. Defense is mostly "Kill everything before it kills you", but with Glancing Blows from the shield + spell suppression combined with trickster es leech, the build is fairly comfy.. The weaknesses are definitely degens (when there's nothing around to leech from) and attack hits. I'm only at 60% attack block so it's possible for multiple hits to get through my ES and kill me. All that said, I farm uber bosses and 100% deli maps without any issues so it's definitely tanky enough for my softcore playstyle.
Sitting at around 150mil boss dps. Can pob warrior a bit by checking focus and "always on full es", but that's not super consistent with all the degens in boss fights. This also doesn't count any extra hits from Vengeant Cascade. If anyone knows how many extra projectiles from Sniper's Mark + Fork can actually hit, I'd love to know.
Still have plenty to upgrade. For example, my weapon is from when I was still cold convert and isn't doing too much for me right now.