Meteorb
Utilizing Meteor and Frozen Orb, the Meteorb Sorceress aims to solve the Immunity problems faced by single Element Characters. Due to its low synergy count, Frozen Orb is a strong Skill that leaves enough Skill Points available to achieve powerful Meteor damage.
Less reading, more LLama
Video Build Guide
This build is strong in its own right as it is very powerful in Nightmare or while you are still leveling and do not have many skill points available but still want to be able to farm Hell effectively.
The downsides of this build is that it does not scale well. It is easy to hit the peak performance of a Meteorb Sorceress, and thus it cannot go any faster once you get to endgame gear.