Kairos world bosses drop some of the best loot in Borderlands 4, and you do not need a full party to farm them. You can run a tight, repeatable solo loop that turns these huge enemies into fast, reliable loot runs. The method works because the bosses follow a clear spawn rule inside a cave rift, and you can use that rule to force a steady rhythm of spawn, kill, reset, and repeat Borderlands 4...