Was going to make a thread regarding this. There are many many under populated mobs in the NE of the map, especially some of the OP sectors. Complete waste of zones IMO. And as you said, the drop rate for mobs such as terror leapers/raptors are pretty poor considering they are high ranked mobs. Terrormaulers may as well be bumbed to the same level as a Doomreaper too and give the chance for them to drop techs purely because of the silly damage they do. There's no reward for tackling them as it stands and leads to entire zones being populated by them and hoppers because no one can be bothered to clear them out.