Played mostly fighters, myself, but for a mage, from what I remember, you'd want to put most of your stats to int and dex. To get some more current info, and some sample character builds, I'd suggest you go to Stratics. There is a ton of info there - check out the forums and they should be able to tell you everything you need to know.

To the everlasting glory of the infantry...

Owain ab Arawn
KGB Supreme Knight
King's High Council