You need to get 12 levels as a Sentinel to get all the immunities. What are some of your favorite character builds to play in KotOR2. If you absolutely want to play through the game as the LIGHT SIDE you will have the easiest and most fun time leading off with the Jedi Guardian and then picking the Jedi Weaponsmaster as your presteige class. Keep in mind that what is ULTIMATE will always be based on subjective preferences and that there will be many different takes on what that means most dominant most fun most canononical etc. If you take gear out of the idea of the strongest build because you dont even get some of the best gear to the end of the game anyway and if you really wanted could become a 26 or 27 Jedi very quickly in the game.