I'm a level 50 Assassin. I am having trouble with every story mission that has me fighting a sith inquisitor. The biggest problem seems to be that they use lighting storm every ten seconds. I've tried jolting it so it doesn't go off, but I still can't get these guys to die. My experience to date is to just level up three levels and go back and muscle through the fight. But now I am level 50 and I have to kill Darth Kallous in the quest called the Duel to proceed and I can't gain any more levels. I am dps specced with as much willpower and crit as I can. I get all my gear from oranges that I get for handing in commendations. I have been using Khem as my companion because I can make gear for him as a synthweaver. I tried using Xalec on some other mobs and he gets burned down even faster. I tried using the healer but I can't make equipment for him and I am trying to save credits. So my question is how do I beat this guy. Am I just using the wrong companion or is there some other trick that I am missing. I can get him down to around a third health before I have to vanish.
By the way I just have to say that these class missions are much too hard at the end and should be easier so you get to see all the content. The side missions are a LOT easier and it makes no sense. Also the space missions get way too hard. One of them has you kill 150 mines. I mean 150. That is a bit excessive if you ask me.