Thank you! This is exactly what I was looking for! Perfect length video and great explanation! All the other videos I've tried to watch so far either took far too long to get to the point, if they got to the point, or didn't explain WHY you set it up the way you set it up, or assumed you had all the DLC and using items from there (I only just got the game, I'll get the DLCs eventually, but learning how to play base game first) I was concerned about the visitors. Your video was the only one I've managed to find that exolains how to not affect the visitors while still being able to defend off the invaders.