NPCs composing that spawngroup :

#a_tiny_insignificance (100%)

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

befallen_56, range=92 (-365,104,-10)

skeleton_Lrodd (50%)
skeleton_Lrodd (50%)

befallen_45, range=99 (-359,91,-68)

a_ghoul (50%)
a_necro_acolyte (50%)

befallen_42, range=63 (-395,95,-11)

befallen_41, range=66 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_60, range=92 (-373,69,-10)

befallen_85, range=44 (-483,71,-78)

a_greater_skeleton (50%)
ice_boned_skeleton (50%)

befallen_88, range=57 (-400,98,-39)

befallen_89, range=27 (-456,80,-39)

befallen_90, range=20 (-437,104,-39)

befallen_106, range=35 (-486,86,-77)

a_ghoul (50%)
the_thaumaturgist (50%)

befallen_109, range=72 (-438,37,-75)

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_110, range=38 (-494,95,-76)

befallen_113, range=87 (-465,20,-39)

befallen_115, range=60 (-449,47,-38)

befallen_116, range=85 (-540,85,-39)

befallen_120, range=66 (-519,130,-39)

befallen_121, range=70 (-511,152,-39)

befallen_#Insideous_Cloak000_26713920, range=98 (-553,131,-38)

#Insidious_Cloak (100%)