NPCs composing that spawngroup :

a_thought_leech_evoker (50%)

a_thought_leech_spiriter (50%)

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

thedeep_a_thought_leech_evoker219, range=30 (688,396,-62)

a_thought_leech_evoker (100%)
a_thought_leech_evoker (100%)

thedeep_224985, range=54 (693,372,-62)

a_thought_leech_evoker (50%)
a_young_thought_leech (50%)

thedeep_225075, range=32 (703,395,-64)