NPCs composing that spawngroup :

Ruttus (50%)

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

mischiefplane_12, range=23 (201,-113,121)

mischiefplane_23, range=94 (288,-43,118)

a_false_treasure_chest (50%)

mischiefplane_32, range=85 (144,-144,73)

a_comical_rat (50%)

mischiefplane_63, range=68 (186,-170,156)

a_detached_hand (50%)
a_detached_hand (50%)

mischiefplane_67, range=64 (245,-174,158)

a_giddy_gorilla (50%)

mischiefplane_69, range=16 (237,-103,183)

a_detached_hand (50%)

mischiefplane_70, range=33 (255,-126,189)

a_detached_hand (50%)

mischiefplane_72, range=77 (150,-91,168)

a_backwards_sphinx (50%)

mischiefplane_130, range=74 (298,-110,117)

a_dastardly_rascal (50%)
a_dastardly_rascal (50%)

mischiefplane_131, range=16 (240,-108,118)

a_false_treasure_chest (50%)

mischiefplaneChesnut00048973508, range=83 (147,-148,167)

Chesnut (50%)

mischiefplaneEightySix00150110804, range=79 (178,-179,157)

EightySix (50%)

mischiefplaneRaesar00058164305, range=8 (231,-109,121)

Raesar (50%)

mischiefplane_99132, range=94 (193,-24,117)