If you choose to let the Charmed Orc live (or lose the conversation) and then teleport the orc away and kill her, she apparently resurrects herself and goes back and kills the guards.
Also if you attack the Orc after choosing to let her live both guards are against you. Shouldn't the one who said to kill her be on your side??? I understand the one who is in love with her attacking but the other guy wants her dead.

Minor heal potion = Minor heal potion = Medium heal potion works having only one potion.