
Most players think farming Ubers requires endless grinding of Maven's Invitation or farming addictive content like Blight. However, the most efficient "set-and-forget" method to generate a steady supply of Uber boss fragments is utilizing a specific combination of keystones on your Atlas Passive Tree.
Farming Ubers is often described as "expensive gambling". To maximize profit, you should choose a boss based on your risk tolerance: Uber Shaper (The Cosmic Eidolon) uber boss farm poe best