For what disciplines, I recommend both mining and botany, and the jobs that pair well with those are goldsmith, weaver, and carpenter. I chose weaver and goldsmith with my alt and ended up picking up leatherworking bc a lot of leather goods are used for weaving.

Also, if you join a free company with housing, they will usually have crafting and/or leveling buffs turned on. They may have a vendor at the house and crafting tables to help your crafting as well.