Is limit break not a thing?

[KaldeaSahaline]

The thing I've come to despise when playing Ninja, is going to all the trouble of setting up a perfect Shadow Fang/TA LB to finish off the boss, only to have it taken by the ranged DPS, or worse, a tank or healer.

Shadow Fang's slashing bonus and TA have 0 impact on the damage a LB does. LB's damage calculation is a measure of average weapon ilvl of the party. Nothing external or internal impacts it, not even weakness.