As everyone should know, there are issues with the Goblin and Rat spawns in the Abyss. In the goblin spawn there is an area where the goblins can spawn that they get stuck which absolutely require a ranged character to kill, and even then can take forever to have line of sight to kill them. This includes the renowned goblins. The Rat Spawn, is the ONLY spawn I've noticed so far that requires you to kill all previous spawn before it will restart, and the spawn LOVES to wander. Also same that the goblins have, the south East Rat spawn with the hell hounds has a nice little spot where the rats love to spawn that yet again, absolutely requires a ranged character.