The map could be good for Bounty Hunt maybe with a VIP in a few different areas. Looks great, I can see you have added some details. Does it have to be at night though, I always find dark night maps a bit dreary when there are some great colours during the daytime.
No, I filmed it in parts in the editor because of limits, I killed the AI in a section, then deleted them and re-added them in the next section if that makes sense. I believe you can have upto 212 AI characters through all 5 waves. I'm still learning the editor so might be wrong on that.
It's currently a journey map, but I like the idea of having a few bounty hunt targets around the map. I'll give it a test later, I'll also tweek with the weather and day/night cycle to see if I can make it more colourful.