Should Form Bonuses apply to the Soak value against demons, faeries, and the like? If yes, should it be the specific form the creature represents, or plain Vim?
If they hit you - that means it's their physical form - i would use the form corresponding to actual form. If this is a power, I would use the form of the power.
If it's vim, then vim form, but if it's another, then the other.