This may usual farming route for Amethyst Lumps once they all respawn all over Inazuma Islands.
I use my ore farm team:
Zhongli (Fast Farm with Hold E)
Rosaria (Passive speed increase when night)
Kazuha (For passive reduction for sprinting)
Sayu (Alternate sprint with E & Claymore for secondary farmer)
Anemo resonance which consists of Stamina reduction, speed buffs and E skill CD reduction.
This speed run almost costs 60+ minutes but when I do it I usually do take more than 80-90 minutes due to reroutes extra farming meats, butterflies, frogs and lizards etc.