If it's pure, unadulterated damage you want, go for dual wielding. Waves of Force is a great crowd controller, while Elemental Rage is perfect for taking down bosses.
For medium sized parties (Veteran difficulty) consider getting a fighter into 2-handed weapons for War Cry (reduces enemy armor, and the scatter effect can be mitigated with the nature mage's Gravity Stone).
From cradle to coffin... Shall my wickedness... Be your passion