Sith Order (Lady Ennui)

The Sith Order of Lady Ennui was a Sith revival group. They believed the the Rule of Two based Order of the Sith Lords was fatally flawed, but rejected the idea of going back to the ideas of the Ancient Sith Empire. A new idealogy was formed, the Rule of One, the one being the Sith Overlord, and there were many members. Loyalty and obedience were emphasized, and theoretically anyone could become the next Overlord

Sith Adepts (Sith Hopefuls)
The Sith Adepts were Force-sensitives who were accepted into one of the many Sith Academies. They were indoctrinated into the Rule of one, and those who would graduate were blindly loyal to the Order.

Sith Acolytes
A Sith Acolyte was the apprentice of a Sith Crusader. An Acolyte would learn all he or she could from their master, then they would undergo a series of trials, similarly to the Jedi Trials. If they passed, their training was complete.

Sith Crusader
The Sith Crusaders comprised the majority of the Order. They were the ones who had passed their trial and were full members. They generally took on at least one apprentice, and were encouraged to do so.

Sith Lord
A Sith Crusader who had successfully trained an Acolyte was granted the rank of Sith Lord. They were a also given a new name, though the "Darth" honorific was dropped. They could also become a member of the Dark Council, where they would advise the Overlord.

Dark Lord of The Sith
The leader of the Oder, and the face of it. They commanded loyalty and respect above all else. The current overlord is Lady Ennui.