The answer to your second question is yes. If you go to the behavior of your encounter you can change it to "Fight to submission". The enemy will become a neutral NPC at 10% health.
I can't make my own posts so I am going to ask my question here: Is there a way to change the spawn point when transitioning into a Neverwinter Adventure map? I really dislike that I have my quest has you enter a door to a home and then when you leave the house you end up at the entrance to the zone, not the door you…