I remember using this site: http://quickgamer.net/games/arcane-legends/wizard/ when I first started out BEFORE I discovered these forums. Its probably outdated a bit but provides a good overview on it.

STRENGTH: Health points
DEXTERITY: Critical Hit % and Dodge
INTELLIGENCE: Mana points, bonus damage and regular damage output

I would try to find some with STR and INT. INT Definitely, but don't overlook STR which boosts your HP so you're not as squishy.