PoE Impending Doom, Witch, Spell builds

I thought i was fairly capped for endgame content but I can't do past Wave 20 simul, uber atziri (oneshot by every ability...), ubers, Feared, and die once in a while in juiced t16s. Did a 80% deli but 100% is out of reach. Oneshot every 5 seconds in rank500 tota (lucky I'm finished with all tota challenges for the league). Any advice on where to go from here with 40~ divs? Original plan was Forbidden Rite but MBs are too expensive this league. Could I finish 40/40 with a BV, poison SRS, or similar? Doom is great fun and all but it can't do the content I enjoy d

Path of Building: 6 Power Charges, 6 Curses, 99% reduced duration Impending Doom Using several uniques and the Window of Opportunity wheel, this buid achieves 99% reduced duration of temporal chains to allow for very rapid proccing of Doom Blast. This build uses power charge stacking to achieve a curse limit of 6 while maintaining a high critical strike chance. This allows the use of powerful offensive and defensive curses to scale the damage along with the Occultist Ascendancy. Sanctum uniques are used to scale cooldown recovery rate and get elemental damage re

6 power charges, 6 curses, 99% reduced impending doom curse duration The impending doom rework this league is extremely fun, but most variants of the build are using curse-overwriting with Vixen's Entrapment and Cursed Ground / Spell Cascade for application. Impending doom is supposed to be triggered on curse expiration, but it also works on curse overwrite. This feels... unintended to me so I wanted to make an "ethical" version of the build. Long story short, I use a very specific Cane of Kulemak and the "Window of Opportunity" passive tree wheel to get 99% reduced duration of my Anomalou