This Sorceress is decently solid but really starts to pick up in damage once Infinity becomes available to her. Conviction Aura is known for best breaking Lightning Immune Monsters, leaving them vulnerable to the extremely high damage of the Light Sorceress. Once this item is obtained she can virtually farm any area in the game without concern.
Less reading, more LLama
Video Build Guide
If there are a lot of scattered monsters, Chain Lightning may be preferred to hit them all. Otherwise, you can use Lightning and line up shots that pass between multiple monsters.
While she may have good resistances and mobility compared to a Javazon, it is easy to teleport into the wrong spot and die quickly.