Legion Events, Infernal Hordes, and Diablo 4 Items Kurast Undercity

These are all solid alternatives depending on your goals:

Infernal Hordes and Kurast Undercity runs tend to be lucrative for both loot and crafting materials, especially Obducite.

Legion Events offer a shot at multiple Diablo 4 Items, including Artificer Stones, and can be tackled with groups for faster clears.

Nightmare Dungeons

If you're running efficient builds which you can buy Diablo 4 Items to help you blast through content quickly. Nightmare Dungeons provide a steady stream of stones. These dungeons are great for experience, glyph XP, and other resources as well.

Whisper Caches

While not as direct as the above methods, Whisper Caches from the Tree of Whispers occasionally reward Artificer Stones. They're a good supplemental source while farming Grim Favors.

How to Use Artificer Stones

To open a Pit of Artificers portal, you must spend three Artificer Stones. Be strategic- each portal is single-use, and high-level Pit runs require solid builds and gear to succeed.

Inside the Pit, expect enemies that scale rapidly in health and damage. Progressing through Pit levels is necessary to unlock higher Torment tiers, increasing your access to elite loot. As you climb, use systems like Masterworking to cheap d4 mats enhance your gear and improve survivability.