Build POB: https://pobb.in/TeXv1QNu2gKP
Full wave 30: https://www.youtube.com/watch?v=Iz72D6zd6xE
Shaper kill: https://www.youtube.com/watch?v=f_Zf6TzDeAs&t=11s
My goal this league was to make a character AFK simulacrum to eliminate the worst part about playing the game: actually playing the game. It can AFK simulacrums to wave ~27 before needing to pay attention to flasks. Not the best simulacrum farmer as it can be inconsistent depending on the mods, but I at least hit my goal!
The crux of the build is just sitting in the middle and staying still. I use replica rumi's concoction to give a ton of block, and it doesn't matter if I am a statue the whole time as saqawals twisters will keep pooping out. Flask charge on crit keeps this flask full in the thick of the waves. Arctic armor gives phys mitigation, along with nature's patience which gives a flat 20% less damage taken.
Build guide if interested: https://www.pathofexile.com/forum/view-thread/3312541