Yeh, wrong one, but cant find again what I meant to paste :P
Anyway,If there is no specific text saying otherwise, this is how the types of damage work:
Physical - Scales with your Attack stat and is reduced by the enemy's Defence stat.
Magical - Scales with your Magic stat and is reduced by the enemy's Magic Resist stat.
True - Scales with both Attack and Magic stat and ignores Defence and Magic Resist.
If it doesn't scale with magic at all on the Nomad, it could be bugged and the magic scalling might be missing completely.
it's not the first time this happened if it did,since some other characters with missing scalings were fixed in previous updates too.
btw: I don't think a dev ever posted the above as guides somewhere...they're just compiled observations after some months in this game.
Correct me in case I'm so wrong