At max level the Legendary Ninja Class Mod grants the following stat bonus:
Melee Damage: +62%
The regular Ninja is inferior to its Legendary version in every metric, thus hasn't been granted a stand-alone page. The displayed Class Mod uses the regular Ninja's texture, to make it easier to distinguish.
Borderlands 2 Class Mods can boost up to 6 different skills by 4, 5 or 6 Points. A Class Mod's Bonus Point distribution depends on its rarity, level and parts.
Here are the optimal distributions for each rarity at level 50 and above:
Legendary: (4/4/4/4/4) or (5/5/5/5/5)
The Ninja's non-legendary variants can only boost these skills:
Backstab, Resurgence, Killing Bl0w
The Skills an Armor comes with depend on the 2 Classes Powers and their order. Select the Main and Secondary Class to see the Armor's Prefix and which skills it can have.
Dedicated Drops are Class Mods that only drop from its dedicated sources.
Unlike World Drops who can drop almost everywhere at a small chance.
Loot Luck Formula
L = Loot Luck
P = Legendary Dedicated Drop Rate
⚙️ Recipe for mentioned chances