Actually, modeling fury crafting wouldn't be too difficult. I imagine you'd have to change some of the skills for a Codex Alera game, and the magic system would need a lot of changes (no stress for basic furycrafting, for instance, but you'd need to have some external source for the element you are using).
Wind Crafting: For someone like Amara, you'd take Fly, Inhuman (or Supernatural) Speed, and some modified form of channeling for wind to model everything she can do. Then you make a custom power that says she has to have access to open air for her powers to function, and that salt prevents her from crafting for a limited time.
Fire Crafting: Some modified form of Fire channeling, and a whole lot of incite emotion upgrades gives all the stuff you need to cover the basics of this. A custom power saying you need fire to make any of your abilities to work.
Earth Crafting: Inhuman (or Supernatural) Strength, a modified Earth Channeling, incite lust, probably one or two other things I'm forgetting. A custom power saying you have to be connected to the earth for any of your powers to work.
Metal Crafting: A custom power increasing your attack when using a metal weapon, and increasing your defense against metal weapons. A craftsmanship stunt when working with metal stuff, stunts to let you take more consequences before being taken out whenever you are touching metal. Maybe Inhuman (or higher) toughness.
Wood Crafting: Glamours, and a stunt(s) to increase your skill with bows and perhaps even some modified form of channeling for wood. I don't remember the books going into much detail about what Wood Crafting could do.
Water Crafting: Wizards Constitution, or perhaps a modified form of flesh mask for the youthfulness part of it. Modified channeling for water. Recovery powers, and custom empathy powers to represent the truth detection abilities. Finally, the thing that would be the most needed for testing would be how to create the healing powers of a powerful water crafter.
And thats just off the top of my head, there are probably a lot of other stuff that I missed.
Edit: Already thought of something I was missing. Water Crafters could also get a modified form of the Mimic Form ability.