DRG was really bad in FCoB compared to double MNK or MNK + NIN, but they got a buff and now they're on equal footing again.

Ninja's main focus is their mudras - keeping track of when to use what is key to optimizing your DPS. Other than that, they have access to Goad (TP regen single target), a slashing debuff when there's no WAR around, and Trick Attack which is a raid wide +DPS for a short period of time. Standard damage combo + DoTs otherwise.