Dragon age origins the best spells for a pure damage dealing mage?

I love the game dragon age but I've never exactly been able to build a mage to it's best damage dealing potiential. I hear people say they hit in the 900 with a mage the most I've ever done with one spell is...76. So what are the best spells to be purely a damage dealer?Dragon age origins the best spells for a pure damage dealing mage?
Well first you need to boost the power of your spells to do massive amounts of damage. Spell Might and Spell Wisp boost the power of Spells, not just for damage purposes but also healing and stuff. Also using for example an ice spell on a rage demon would do like 200% damage, because their made of fire or fire based, something like that. Go to dragon age wikia, just google it. They have mage guides, spell combos, mage builds etc.