Sith Inquisitors in SWTOR can become one of two advanced classes at level 10, a Sith Assassin (DPS / Tank Class) or a Sith Sorcerer (DPS / Healer). The Sith Assassin uses a double bladed light saber they use to do impressive melee damage. The assassin class also make good tanks, they are more of an avoidance based tank but do make use of their force skills and shields to tank. Assassins have three trees to choose talents from: Darkness (DPS tree), Deception (DPS tree) and Madness (a shared DPS tree shared with the Sith Sorcerer Class).
Below I will list the best sith assassin builds to use for your sith inquisitor so you do not have to wastetime figuring out what sith assassin builds work best.
If you wish to submit a assassin build please email it to admin@assassinbuilds.com, listing what it is for and any other relevant information I should know about this assassin build.
Changes made to the Sith Assassin class in patch 1.2:
•Deflection's effects are now more noticeable.
•Electrocute's visual effects now occur more quickly after activation.
•Energize's effect now triggers a sound effect when it occurs.
•Force Lightning now correctly plays its sound effects when the initial application of damage kills the target.
•Force Slow visual effects now begin and end at the correct times.
•The Sacrifice ability has been removed from the Sith Inquisitor class. A similar ability can now be unlocked through the Legacy System.
•Mass Mind Control: Updated this tooltip to correctly state that the ability does not break stealth. The ability's functionality has not changed.
Madness
•Death Field no longer heals the caster if no targets are hit.
•Raze's activation effects are now more visible.
Builds that focus on the Darkness tree (Sith Assassin Tanking Tree).
31/0/10 - Assassin Tank Build - This looks like it will be the main cookie cuter sith assassin tanking build.

Assassin builds that focus on the Deception tree(Stealth/DPS tree).
5/33/3 - Assassin Deception PVE Build - This is the main Deception PVE build, this is currently the highest DPS spec for Sith Assassins.

2/31/8 Deception PVE DPS Squishy Killer Build
- This is a high DPS Build for use against squishy targets. On most fights the above assassin build will do more DPS.
5/33/3 - Assassin Deception PVP Build
- This is the most common PVP build being used by Sith Assassins.
Assassin builds that focus on the Madness tree(DPS tree) .
7/3/31 Assassin Madness PVE DPS Build 
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| Looking for a leveling guide for your SWTOR character? Killer Guides offers guides for all classes in SWTOR with usefull information on how to play your class and how to level fast. They also have a package where you can buy all of their guides for a lower price. These Guides are a good read and can be helpfull. |
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| Looking for good place the best place to buy SWTOR credits? SWTORCreditReviews.com is a TOR credit review site, they list the best companies that sell SWTOR credits. This is site done by the same people that do WOWGoldFinder.com, a trusted WOW gold review site that has been around for more than 4 years. |
| Looking for a leveling guide for your SWTOR character? Killer Guides offers guides for all classes in SWTOR with usefull information on how to play your class and how to level fast. They also have a package where you can buy all of their guides for a lower price. These Guides are a good read and can be helpfull. |