Attributes:
Craftsmanship - Primary attribute
What it does: For every 3 ranks in craftsmanship, Structure armor is increased by 4%, and Artisan skills cost 1 less energy (minimum 5).
What kind of skills are involved: Skills that increase casting speed, and structure quality. Skills that enhance auras in various ways.
Architechture (sp?)
What kind of skills are involved: Structure crafting skills [Very similar to binding & nature rituals, but with a few notable exceptions: longer casting time, more expensive costs and generally more powerful. Although they can be damaged, they have higher armor than spirits, and do not have a finite duration. The Catch - Multiple structures can not be within range of eachother - this means that only one structure can effect you at a time. The most recent structure set up will override and destroy any structure in range.]. Enchantment skills that modify structure effects.
Aura control
What an aura is: Basically, an aura acts like a ward, but is attached to your character, and has a 'earshot' range. Auras do not slow you like holding items would. Only one aura can be active per character at a time, and you maintain them, the same way you would an enchantment. All auras don't have the same maintainance cost - Some have larger energy degeneration, some even have health degeneration. Multiple characters can have active auras at the same time, but having multiple people use the same aura won't make them stack. Auras are generally weaker than wards.
Throwing mastery
What usable projectiles are: The Arisan's primary weapon. All things throwable. Rocks, (special kind), knives (special kind), *no spears*, disci (plural of discus

What kind of skills are involved: Preparations and enchantments that effect damage type, power, and attack speed. Also Attack Skills.
Influence
Nature rituals.
My mind is a bit blank and I'll fill in the rest later guys (and gals....?)