second class can be related to elemental control, same as the genshin impact main character where the traveler can switch the elements
or
it could be a job description such as him having buff of achieving rare titles such as sword master to perfect Jinchuuriki, etc.
I want to say second would be ranger. It just fits him more than the other classes because of his skills. If not that than maybe the wizard class, cause I can see that helping him with his chakra control