The two key skills to a lightning sorc are "Chain Lightning" and "Lightning." The chain lightning is great for groups of monsters. It does less damage per hit, but it does many hits. The lightning is great for single monsters. It does only on hit, but it does more damage. And when fighting a single creature the chain lightning will only hit once. So lightning for head to head battles and chain lightning for groups.
The combination of orb and meteor is a power duo that will handle most situations. And definitely is a welcome combo when handling the light immune souls.
The Enchant Sorc is a very special build. Its primary use is in helping low level characters get their start in life.
The group sorc has several functions in the game.