NPCs composing that spawngroup :

a_clockwork_scuttler (100%)

NPCs spawning around that spawngroup :
(Max range : 100)

corathus65169, range=55 (-116,446,-34)

corathus65170, range=48 (-195,448,-12)

corathus65172, range=57 (-211,441,-12)

corathus65175, range=23 (-173,433,-12)

corathus65180, range=96 (-256,429,-13)

corathus65194, range=64 (-200,362,-13)

corathus65197, range=63 (-171,350,-12)