Hints: sorcerers
Masters of magic, sorcerers are essential to your party's success. Able to smite many foes from afar with a single wave of their arms, they are quite powerful, and a mistake if you don't take them. Their spells also make your life a lot easier, allowing you to fly above everything, walk on water, enchant your items, even teleport from town to town and in and out of dungeons. Just these last few spells will save you hours when you are trying to find someone and you can't remember where he is.
There are a few things that sorcerers should advance in. Simply put: Magic. Grandmastery should be obtained in the four elemental schools as well as in either the Light or Dark schools. Grandmastery should also be attained in Identify Monster and Identify Item. Mastery in Meditation is also a good idea for these characters. The Staff should be raised as their single weapon, and then only to master level. Their armor should be Leather, and that only to expert level. Alchemy is also attainable to master level, but should only be acquired at a later date - magic should come first, or you will find yourself having problems advancing, because the enemies get really hard, really fast.
The optimal beginning sorcerer should have a high Intelligence to get more spell points. Endurance and Speed should be as high as possible so they can survive more than a hit or two. Personality is useless for them. The other three abilities are nice for them to have.