Some classes, like Casters, Ninja, Bard, Cleric, etc., use either Diamond Hoes or Shears or other items that have infinite durability. Classes that use Swords, Axes, or Shovels have to replace their weapons constantly. The diamonds for these weapons is an unfair, if small, expense. It would be fair if the items that Arsenal NPCs trade for in spawn came with high Unbreaking enchants. This would not make them more powerful, it would just bring them in line with the infinite durability of other weapons.