Question up for Discussion

As Raith, Tor and I have been working out the kinks in our existing magic system, we have been encountering an idea we want to get all of your opinions on. The idea is that we should think about switching to a mana system, where we all gain more spells per period (or mana as it would be called), but the level of the spell cast determines the mana usage.

Right now it costs only one personal spell whether you cast a level 1 Know Rune or a level 3 Know Sigil. Under the mana system it would cost one mana to cast Know Rune, and 3 to cast Know Sigil.

What do you all think about this? I would be interested to hear what you think the potential benefits and problems of the system would be.

-Lahar