Which class grinds the fastest?

Well, it's for event reward and the char would be on a completely new passport, so it doesn't matter which class it is. As long as it reaches the goal the fastest, it would be good

Hmm. I have excluded these classes from my choice:
- adventurer warriors (horrible mobility)
- buccaneer (horrible mobility)
- mechanic (horrible mobility)
- aran (I still love my keyboard, tyvm)

How does soul master (probably called dawn warrior in GMS?) fare compared to other classes? Never train the revamped one before, so I was wondering whether I probably should try one at the same time.