The Path of Vaul is a more subtle mastery that will have your Archmage focused on crippling their foes and buffing up their friends. For those that head down this path, you'll find that your points will head into effects that will help to kill their enemies before they even know that you are doing it.
Here are some of the special skills and abilities that this path offers:
1. Radiant Gaze: this is an instant cast that will do some great DoT as it steals the mob's ability to get a critical hit.
2. Rain Lord: this is another instant cast that will lower the ballistics, strength, and intelligence of the target within 30 of the blast. (This is a great crowd control to use in RvR play and in dungeons and other larger group settings.)
3. Law of Gold: while this isn't an instant cast, it is a quick spell that will silence your target and do some DoT as well.
4. Scatter the Winds: this instant cast will do DoT and reduce the healing that the mob receives by 50%, so this is yet another must have for those in RvR combat where their healers will be working to heal everyone they see.
5. Mistress of the Marsh: this is a great AoE spell that will trap targets and lower their aggro. You can use this to help ranged attackers get their hits in before the mobs are upon you.