Back on topic...
If you don't want to do the Hissss exploit, I found another. I haven't seen it documented yet.
When you're on Duxum, and the Sith Assassins attack the camp, if you go to the second area, after the cut scene about the cloaking, you will notice two groups of sith fighting Mandilores (sp?). If you keep going back between the two groups, the sith will keep respawning.
The trigger to stop the sith spawning is near one of the buildings. If you walk near the building a single file line of sith will uncloak, and when you kill them all, then the series end. So, don't wander too close to the building.
And the cool thing is, you don't even have to really fight, you get XP even with the mandilores (again, sorry spelling?) killing the sith. I was getting 400xp a pop with each sith taken out, and they were spawning three at a time. Easy money Not to mention the crap loads of remains.
I made two levels at that point before I finally figured out how to stop it.
