A Staff Of Mana is required. The sorcerer begins with one. Set the Mana recharge ability to a quick key, such as F5, and any other ability nearby (Firebolt, Healing, etc.). Set Mana charge (F5) and right click to replenish your Mana. Right after you right-click, change your ready ability to another (F6, F7, or F8). If done correctly, the charge of your staff will not have been spent. This trick will make the game easier for the sorcerer, since you will not have to buy dozens of Full Mana Potions, saving money and space for healing potions on the belt and found equipment in your inventory.