Their unique body form determines that they would not easily embark on other professions, as the professional abilities designed for humanoid creatures are not suitable for them.
Spirit Soul Naga is more appropriate to be described as a Magician rather than a Mage, as all his spells exist as spell-like abilities and changing them is exceptionally troublesome. Despite having the Special Spell Conversion ability, this capability was not innate but activated after achieving Transcendent Intelligence. This means that before this ability was activated, Spirit Soul Naga couldn't choose his casting abilities and had to activate whatever was available upon leveling up, restricting him to these spells for a long time.