Many Bright Wizards prefer to AoE (area of effect) farm to complete quests and gain experience and influence. This can be a very effective method, but you must be careful. It is better to wait until you are a little bit higher level than the monsters you are fighting before attempting to AoE. Essentially, the purpose of AoE is to gather up multiple monsters and damage them all at the same time. You will benefit greatly by having a steady supply of healing potions if you are going to use this method. Likely if AoE is your style you will be taking the Path of Conflagration. An example spell choice and rotations is:
Ignite several monsters from maximum range, then Detonate. When they get closer, Flame Breath in their direction. If one or more of them still has a decent amount of health points, Fire Cage, back up a little ways, and Fiery Blast until they are all dead. Otherwise, use Scorched Earth liberally to take them down. Of course, spells like Sear can be used to finish off stragglers. Using this method you will likely suffer more damage, and probably die more, but usually earn more XP and other advancement points at a higher rate.