NPCs composing that spawngroup :

a_shrieker (100%)

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

thedeep1312284, range=191 (-644,-309,-92)

a_shrieker (50%)
a_shrieker (50%)
a_shrieker (50%)
a_shrieker (50%)

thedeep1312183, range=196 (-328,-154,-126)

a_young_thought_leech (100%)

thedeep1312181, range=179 (-632,-324,-93)

thedeep1312180, range=189 (-642,-292,-94)

a_shrieker (50%)
a_shrieker (50%)

thedeep1312136, range=70 (-518,-280,-83)

An_Enthralled_Underbulk (100%)

thedeep1312135, range=47 (-499,-294,-77)

thedeep1312131, range=167 (-447,-139,-91)

a_thought_leech_evoker (50%)
a_thought_leech_spiriter (50%)

thedeep1312130, range=176 (-421,-132,-90)

a_thought_leech_evoker (50%)
a_young_thought_leech (50%)

thedeep1312051, range=84 (-380,-348,-54)

an_enthralled_outcast (50%)
An_Enthralled_Razorfiend (50%)

thedeep1312020, range=163 (-291,-330,-58)

an_enthralled_outcast (100%)

thedeep1312019, range=64 (-399,-341,-56)

An_Enthralled_Razorfiend (50%)
An_Enthralled_Razorfiend (50%)

thedeep1312018, range=196 (-323,-454,-55)

a_shrieker (50%)
a_shrieker (50%)

thedeep1312017, range=174 (-627,-296,-94)