- Four to six years is typical (this holds in general for the faction academies), depending on how hard your specialty is and how hard you work/how smart you are.

- Rahal scrying is an exotic effect. It will work on a non-hexarchate citizen as long as they're in high calendar space. Someone [from] outside the hexarchate will manifest a signifier if they enter high calendar space. A signifier is sort of like visual shorthand for a personality quiz--scrying will "sort" anyone into what seems the most appropriate to describe their personality.

- One Rahal can definitely scry someone, but the effect is strongest with more people (up to six).

Hope this helps!