Huxley and Sara has a spell calld Mystic Shield. It is usefull only for gaining experience.

By casting the spells on themselves, about every sixth spell you will receive 100 experience points. Use Mage Gems and Mage Oilto proplongthis process.On levels with enemy healer, leave the healer alive so that your other characters who will have stocked up on Mage Gems and Oil can give theeseto Huxley and Sara. There is a very goodreason for supplying magic to Huxley and Sara.Each Time you give Huxley or Sara Magic Pints, youll get EXP back.The amount you get is related to the difference in EXP betweengiver and receiver.

The best time to do this is after the Prison Rescue in Khanos City.