| BobTheSatyr |
I'm not sure how helpful this will be, but I had a similar idea once, and it lead me to think about what exactly a furycrafter was. Based on that, I ended up making an archetype for the summoner class called the elemental furycrafter. Its at the bottom of the page.
The only advice I will give in terms of making everything work is to not re-invent the wheel. Making anything in Pathfinder (or any RPG like it) can be hard, especially classes because of game balance, and if you don't have much experience in it, your players may be dissatisfied. This is the big reason why I personally like archetypes a lot.
On that note, look into making furycrafting archetypes for all the major classes, rather than making it a class unto itself or gesalting into it. You could also add in some feat trees to expand on those abilities.