Playing in an online 4th ed Ars Magica group and one of the group wanted to know what types of vis people usually used for their Aegis.
Our group is a spring covenant with only a single vis source known of value 4 pawns of Aqua.
The good side is we are living on top of a level 6 magic zone so brewing Vim can be good. ( I just fear what the Turb is going to start to look like in a decade or two 
)