I play a mobile/offensive oriented Wizard who cannot take a lot of damage so AOE spells to deal damage to a lot of enemies, such as Missile Salvo and the Pillar of Frost, are helpful so I can finish them off. Upgrading Arcane Veil to Tier 2 is also rather helpful for the Damage Reduction as well as the ability to reflect arrows and spear throws, so pesky damage from afar doesn't become a problem.
