These quests are for Combat Levels 85-90, and after completing the first set, you will have a set of repeatable mercenary quests available to you. To start this quest, you must talk to Loruna Scathe, she's outside the Theed Cantina. She will send you to a lackey, who will then send you to another one. Then you will have to earn the respect of the last three bosses, who are all on Tatooine. These quests require patience, experience, and a little bit of luck. A droideka will be helpful. All this is to gain the Cabal's trust. After doing so, you will have access to a number of repeatable quests. These quests are difficult and should be done with a pet, a droid, or a friend.