Armorcrafting - 390+ skill?
Assuming that it works the same as Weaponsmithing, you can advance in Armorsmithing past 390 using tier 5 components (300-350) by purchasing karma recipes from the Master Armorsmith – they require more ingredients but will still level you up and allow you to make rare armor pieces.
Dust is not in any of the original Armorsmith recipes, but you can figure out uses for it via the discovery panel.
Yak’s Bend
Charr Ranger of the Iron Legion
Charr Ranger of the Iron Legion
Dust is for making invisible boxes (gear bags that you can’t vendor out of) If you’re just looking to level to 400, I would recommend doing it with something cheap like claws.
make a rare item, that’s all i needed to do for jeweler