NPCs composing that spawngroup :

a_thought_leech (33%)

a_thought_leech_evoker (33%)

a_thought_leech_evoker (34%)

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

thedeep1312246, range=100 (-306,187,-61)

a_shrieker (34%)
a_shrieker (33%)
a_shrieker (33%)
a_shrieker (34%)
a_shrieker (33%)
a_shrieker (33%)
a_shrieker (34%)
a_shrieker (33%)
a_shrieker (33%)
a_shrieker (34%)
a_shrieker (33%)
a_shrieker (33%)

thedeep1312239, range=127 (-377,-29,-92)

a_thought_leech_evoker (50%)
a_thought_leech_evoker (50%)

thedeep1312238, range=132 (-346,-37,-91)

a_thought_leech_evoker (50%)
a_thought_leech_spiriter (50%)

thedeep1312177, range=27 (-338,121,-62)

An_Enthralled_Underbulk (50%)
a_shrieker (50%)

thedeep1312176, range=86 (-319,177,-61)

a_shrieker (100%)

thedeep1312175, range=125 (-305,213,-62)

thedeep1312141, range=177 (-179,153,-57)

a_young_thought_leech (100%)

thedeep1312076, range=192 (-252,-72,-61)

thedeep1312075, range=184 (-186,4,-57)

an_enthralled_outcast (100%)

thedeep1312058, range=166 (-250,-40,-58)

An_Enthralled_Underbulk (20%)
An_Enthralled_Underbulk (80%)

thedeep1312017, range=154 (-213,18,-58)

a_thought_leech_evoc_1433246, range=22 (-325,96,-62)

a_thought_leech_evoker (100%)