The artifact slot system can use some revamping. I understand that having too many broken artifacts at once would break the game, but at the same time, some artifacts have less of an effect then others. Maybe a workaround would be making it so that instead of 3 slots, you could instead start out with a 3x3 grid, & to equip artifacts, you need to fit them in backpack hero style, with each artifact having its own unique shape to try to slot in. then later, you could eventually buy more squares for your grid to fit more stuff in different shapes. it might still have its own flaws as a system, but I feel like it could have its benefits as well!