NPCs composing that spawngroup :

a_grime_tunneler (33%)

a_sediment_delver (34%)

a_sediment_delver (33%)

NPCs spawning around that spawngroup :
(Max range : 200)

paludal1248282, range=77 (794,-127,24)

a_sediment_delver (100%)

paludal1248167, range=183 (802,-379,27)

paludal1248152, range=35 (821,-162,27)

a_grime_tunneler (50%)
a_sediment_delver (50%)

paludal1248102, range=77 (830,-275,27)

paludal1248093, range=107 (775,-104,23)