It's so easy getting to 40 so no wonder. I never open geodes as I'm too lazy to go to Clint. No wonder I don't get any artifacts.I usually just crack open Magma Geodes dropped from breaking Rocks on Floor 81-119 in the Mines but some people like to Till the mines in floors 40-79 to get the drop that way.
Yeah artifact troves are the best bet, and to get them just trade omni geodes at the desert trader.Yeah if you're late in the game I'd get a bunch of artifact troves to open.