General Tips-

• If the group can handle the slight drop in damage, try mixing in some wand use. Casting one or two spells and then using your wand will save you some mana, as well as keep your aggro within reasonable levels.
• Cast Arcane Intellect on all party members that have mana. The up front mana cost is high, but the mana it generates during battle can save the group later on.
• Summoning food and water for the party is part of the mage life. You will lower your group’s time between battles by handing some out to your group members.
• Place trust in the party healer, especially if you will be called on to use your area spells to damage multiple monsters at once. The tank will generally not be able to grab aggro during these types of attacks, so you’ll need to concentrate on taking the enemies down as quickly as possible. Hesitating to cast a spell could mean death to you and possibly the group.

Aggro Management-

• A nice trick with Frost Nova is to use it to shift aggro to another player. While frozen, monsters will ignore you if there’s someone close enough to hit. Generally, when the ice breaks, they’ll still target the closer person.
• Remember that you can do damage very quickly, but don’t have any reliable ways to lower your aggro. You usually can’t give 100% of your damage potential in a party, but you’re better off being slightly weaker than dying from having the monsters hit you.