Two of a Discipline
Leveling a second character with the same craft as another character is a waste. I advice you not to do it.
Anyone would disagree with this assessment?
I gave each of my characters one unique crafting discipline, then I gave all of them Cooking. If you’ve got high level character and some bank space, Cooking really easy to level on multiple characters.
I’ve done it when stuff was cheap. I’d never do it now.
Regardless of what my other characters’ disciplines are, I always base my disciplines on what profession I’m playing; Thief has Leatherworker and Huntsman as those are the disciplines that he can make use of. I’ll level miscellaneous disciplines on whatever turns out to become my main character.