In this video, I beat Geo Hypostasis without taking any damage with only free guaranteed units.
Reuploaded because the boss fight was changed slightly after the 1.1 Update
Xiangling is free right now (Oct 7 2020) if you beat Abyss 3 Chamber 3 as is Noelle. You can get Noelle guaranteed from the Beginner's Pull when you first start the game. She is NOT ideal for this fight because her Breastplate and Ultimate do not affect Geo Hypostasis, but we use her because she is the only guaranteed Claymore unit and she breaks pillars in the final pahse quite easily. If you have ANY other Claymore unit, you should use them instead.
Claymore units deal increased (and thus viable) damage to Geo constructs, making them MANDATORY for this fight.
ONE OF THESE MANDATORY UNITS:
Noelle (Free to Play Option)
Razor (From the Paimon's Deals or Random Pull)
Chongyun
Beidou (Low Pillar DPS because she has a 5 step normal attack instead of 4)
Klee (Low Pillar DPS)
Diluc (Highest DPS but rarest)
IDEAL UNITS:
Diluc
Beidou
Razor
Xiangling (for additional passive DPS)
Fischl (for additional passive DPS)
MAYBE AVOID THESE UNITS FOR DPS:
Ningguang
Geo Traveler
Noelle
Zhongli
Geo Hypostasis is completely immune to Geo damage, making Ningguang useless for anything but breaking Pillars. Geo Traveler does not deal adequate damage at all aside from normals.
I beat my first Geo Hypostasis at AR26 World Level 2 on my first try. (I put in a lot of time outside of Liyue). In this video, I beat Geo Hypostasis at level 72 World Level 5 with Noelle and Anemo Traveller without getting hit. Gear and level only let you make more mistakes.
Let me know if you want more guides or even more in-depth boss guides for Genshin Impact
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