I suspect you don't do much adventuring through twisty, spawner-filled dungeon corridorsNever found much use for disarm, honestly. You're a wizard. End your fight from 64 blocks away!
It goes nicely in a "panic button" Contingency -> AOE spell, for situations where you're being swarmed: Skeletons drop their bows, Zombies drop their swords---both of which can be extremely threatening even to high-level mages if you're running mods that add powerful weapon enchantments or tweak the mobs themselves (when mobbed by a half-dozen Gatling Skeletons, you'll be verrrry happy to see them drop their Power V, Wrath V, Pain, Scourge bows). After all, it takes only one of your 13 effects.