Best ways to level NPCs?

[Mike]

I trying to get the blacksmith and few others to higher level to craft some of the best fire/burn damage gear, and I;m having a hard time figuring out whats the best way to level them.

Do you just find materials for the item that gives the most XP? Or do you just craft any chance you get?

I've been trying to farm Mithril to craft ingots as those level pretty fast.

[Morgue]

Diagrams seem to be the best but you can't farm them. So id just focus on crafting every piece of gear once or waiting till you find more diagrams.

[Mike]

Originally posted by Morgue:

Diagrams seem to be the best but you can't farm them. So id just focus on crafting every piece of gear once or waiting till you find more diagrams.

Certain materials also can boost levels a good bit. For example, at the black smith crafting the highest tier ingots are fast way to boost his level.

[Bluebird]

I can't level up some crafting NPCs higher than level 15.
Does anybody have the same problem? Is there a level cap?
I mean eg. Shirin, Ysra, Rhys at level 15 it shows Level 15 -> Level 16 and the NPCs having reached the the points needed(!) e.g. 4360 xp but they don't level up to 16.