Hah I guess setting NPCs on fire that weren't involved in combat can cause some unexpected complications

.. Like Lohse dying about 5 minutes after you enter Fort Joy and get into a fight with Gruff's thug.
Another cool thing about undead for solo or an all-undead group is that Play Dead basically let's you reset a fight after having killed a few enemies. Plus you always have a lockpick at hand.
Didn't think about Play Dead.. lol. Always useful.. though getting back up might be a problem if the NPC is too close... xD