I wouldn’t bet they’ll be adding more classes for Drakthyr “any time soon”. But if they do, they’ll be using the same starting zone, so the answer is 58, unless they add another level squish.
If it was to happen it will be level 1, its the class that starts at 58. Like Dks and DHs at their launch.
However i feel like they wont add more classes to the pool for dracthyr, it be very suprised if they were to retcon that fast given prior reactions to it.
Nobody can really answer this but if it were me, I’d put them at level 10 like an allied race because you can’t really do the starting area as a non-evoker and they wouldn’t be a hero class.