NPCs composing that spawngroup :

a_ghostly_student (100%)

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

frozenshadow_12, range=79 (511,866,23)

#Zorglim_the_Dead (50%)
a_ghostly_student (50%)

frozenshadow_13, range=94 (544,866,23)

a_ghostly_student (50%)
a_ghostly_student (50%)

frozenshadow_14, range=97 (392,787,23)

a_ghostly_student (100%)

frozenshadow_22, range=41 (504,750,23)

a_ghostly_student (50%)
a_ghostly_student (50%)

frozenshadow_23, range=93 (583,802,23)

a_ghostly_scholar (100%)

frozenshadow_25, range=53 (483,842,23)

a_ghostly_student (50%)
a_ghostly_student (50%)

frozenshadow_31, range=53 (543,788,23)

a_ghostly_student (50%)
a_ghostly_student (50%)

frozenshadow_32, range=84 (562,833,23)

frozenshadow_41, range=45 (451,764,23)

a_ghostly_student (50%)
a_ghostly_student (50%)

frozenshadowa_ghostly_student0049646105, range=78 (452,858,23)

a_ghostly_student (100%)

frozenshadowa_ghostly_student0059682469, range=72 (431,831,23)

a_ghostly_student (100%)

frozenshadowa_ghostly_student0069723076, range=58 (431,790,23)

a_ghostly_student (100%)

frozenshadowa_ghostly_student0129880621, range=99 (563,857,26)

a_ghostly_student (100%)

frozenshadowa_ghostly_student0149922039, range=77 (563,764,23)

a_ghostly_student (100%)