Crafting is a critical part of endgame gear optimization in Diablo 4, and lair bosses in Season 9 are a surprisingly efficient way to acquire rare materials like Grain of Anguish, Forgotten Soul, and Veiled Crystals.   Some bosses, notably Goremaw the Festering and Maazuun of the Deeps, are tied to drop tables that include these high-tier crafting components. Their consistent drops make...