|Ok First a good spot to do this is in Papua Trammel.At the bankers next to the bank. What you do is pull up the npcs life bar then move out of sight from him, that is over 1 full screen away, just before the point where the life bar would disappear.At this point attack the NPC's life bar. Have him follow you if you managed to avoid getting guard wacked and lure the npc outside of town protection.Once out of protection tab out of combat and let him hit you then just cast a fire wall on them and let them die.
This is a great way to get black sandles and any really good clothing. If everything is carried out as above you will not get any counts from npcs.