The Archaic Petra is a good Geo set that you will get from the Domain of Guyun. It comes with a nice Geo damage increase as its 2-piece bonus and a further 35% damage increase from picking up the Elemental Shard you create via the Crystallize reaction to a specific element it was created with.
2-Piece: Gain a 15% Geo DMG Bonus.
4-Piece: Upon obtaining an Elemental Shard created through a Crystallize Reaction, all party members gain 35% DMG to that particular element for 10s. Only one form of Elemental DMG can be gained in this manner at any one time.
|Flower of Life||Flower of Creviced Cliff|
|Plume of Death||Feather of Jagged Peaks|
|Sands of Eon||Sundial of Enduring Jade|
|Goblet of Enotherm||Goblet of Chiseled Crag|
|Circlet of Logos||Mask of Solitude Basalt|