Saint Samurai was a very powerful profession, so powerful that the game development team called it a bug.
The core specialty unique to the profession was Body of Light.
The profession's use of any melee weapon rendered it a "weightless" weapon, meaning that even a greatsword could be brandished as easily as a dagger. In the simplest measurement conditions, the heavier the weapon, the faster it could be swung, then the higher the impact damage it could naturally do.
Using a ten-kilogram greatsword, swinging it with the same attack speed as a dagger…
Daggers, on the other hand, were generally around a kilogram, a tenth of the base weight of greatswords.
This was why, even with a focused addition on Charm, the Saint Samurai's melee base damage ability was not far from that of Warriors of the same level.