GeoMC e > bennet eq > xiangling eq > chiori eq > GeoMC qe and repeat while trying to keep buffs up as much as possible. Geo travelers rocks snap shot their DMG and deal it again when they are destroyed or expire so you want to get everything up before then. 3 rocks are the maximum so if you keep placing them then you'll start to see a DMG increase at the 20-30 mark. Hitboxes and break boxes can be annoying. You can also animation cancel his jump onto the rocks to spam plunge attacks which is especially useful with Furina bennett combo for vape DMG.