Farm hardware on the boss «Bandit Leader» (level 50+) on the starting island. It is recommended to use the flame fruit. Stand slightly ahead of the NPC to accept the quest, so that the cursor can freely hover over the boss and at the same time remain in the NPC's access area, avoiding a collision with a lamppost. After that, activate the skills on Z, attacking from a distance. On average, you can collect about 800 pieces of iron in an hour!