Darth Sansus

Darth Sansus was a Sith Lord that was of great importance during the Sith's struggle to return from The Grand Sith Purge. He was a former Jedi Knight that turned to the Dark Side by the seduction of Darth Prone. Prone became his master and brought the young jedi to become a master of the Dark Side of the Force. The Sith soon became a Sith Lord along with becoming a Sith General and Sith Battlemaster.

Lightsaber Technique
Sansus was trained by Darth Prone in the art of lightsaber combat. Prone was known too have been one of the galaxies best duelists. So, Sansus was trained to become a powerful duelist as well.