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)

You know slipstream is actually pretty good horizontal mobility when properly jumpcast, if anything its faster than any other equivalent adventurer mobility skill (unless I'm missing something)

Personally I'd go with a Hayato though because they move around with skills pretty quickly while attacking at the same time.