There are 67 unique items in the World Drop pool, so for farming 1 of the 6 class mods its best to seek out its dedicated Loot Source. You can change item drop rates skin drop rate it's better to change them to 0. Borderlands 2 World Drops are items that drop from any suitable Loot Source in addition to their dedicated sources. Anyone have recommendations on what the best rarity settings are for constantly getting the best items? The legendary only option makes enemies drop massive amounts of useless skins.