NPCs composing that spawngroup :

Kobold_Alchemist (100%)

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

soldungb-Overseer_of_Air00, range=70 (-652,-62,-105)

soldungb_28, range=90 (-677,-218,-81)

sonic_bat (60%)
sonic_bat (60%)
sonic_bat (60%)
sonic_bat (60%)

soldungb_15, range=70 (-595,-179,-90)

soldungb_10, range=94 (-557,-108,-90)

soldungb_46, range=66 (-714,-131,-92)

soldungb_48, range=58 (-706,-124,-78)

soldungb_49, range=61 (-594,-103,-98)

sonic_bat (53%)
sonic_bat (53%)
sonic_bat (54%)

soldungb_50, range=65 (-696,-87,-100)

sonic_bat (60%)
sonic_bat (60%)

soldungb_51, range=80 (-726,-155,-91)

lava_beetle (100%)

soldungb_52, range=64 (-712,-140,-78)

soldungb_56, range=82 (-569,-110,-90)