NPCs composing that spawngroup :

a_thought_leech_spiriter (50%)

a_young_thought_leech (50%)

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

thedeep_a_shrieker34, range=29 (624,91,-61)

thedeep_a_thought_leech_spiriter166, range=94 (539,180,-57)

a_thought_leech_spiriter (100%)

thedeep_a_thought_leech_evoker219, range=76 (540,156,-58)

a_thought_leech_evoker (100%)

thedeep_224969, range=23 (623,105,-61)

an_enthralled_outcast (50%)
An_Enthralled_Underbulk (50%)

thedeep_224971, range=16 (615,114,-61)

An_Enthralled_Razorfiend (50%)
An_Enthralled_Underbulk (50%)

thedeep_224972, range=22 (622,106,-60)