Well, with the new update you can now get regular experience from crafting.
From what i've seen so far: Artisan 35 XP per raw material (leather) refine 30 XP per component creation (pristine brace) 35 XP for the final armor.
Estemnet 55 for regular ore refines 60 for the extracts
As an added bonus, rest experience doubles this.
While this is a fast way to get through the lower levels, you get diminishing returns on higher levels. For example, to get from 75 to 76 you need about 710000 xp. Thats 6455 ore refines at estemnet level with rest experience.