if i attack them, they reset pretty fast and recover their health again. i think they also should trigger the npcs around the turret so the other npcs also should attack me
Fixed. The Abyss guard towers fight with a long-range beam and have no normal attack, and the server only counted the normal attack, so a tower shot from range gave up after 4 seconds and healed. They now keep fighting anyone they can see within beam range. Attacking a tower or a camp guard also brings the guards standing near it. Live after the next server update.