Pretty much focus on Magic Damage, it factors in to every spell harder than even relavent stats, Heals heal more and attacks do more damage the more magic damage you have, its the main reason why you NEED to upgrade your weapon as you progress through dungeons, even if its just through white weapons. Nothing is more embaressing than a level 16 Conjurer trying to heal through Tam-Tara with a level 5 wand for about 80 health a Cure.