NPCs composing that spawngroup :

a_large_plague_rat (33%)

a_putrid_skeleton (33%)

a_putrid_skeleton (34%)

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

befallen_56, range=35 (-365,104,-10)

skeleton_Lrodd (50%)
skeleton_Lrodd (50%)

befallen_45, range=26 (-359,91,-68)

a_ghoul (50%)
a_necro_acolyte (50%)

befallen_44, range=98 (-275,80,-11)

a_necro_neophyte (50%)
a_putrid_skeleton (50%)

befallen_43, range=56 (-319,84,-10)

befallen_42, range=34 (-395,95,-11)

befallen_41, range=29 (-392,92,-67)

a_ghoul (50%)
ice_boned_skeleton (50%)

befallen_40, range=71 (-328,13,-12)

befallen_39, range=94 (-287,31,-11)

befallen_37, range=98 (-294,127,-10)

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

befallen_89, range=83 (-456,80,-39)

befallen_90, range=72 (-437,104,-39)

befallen_91, range=40 (-372,29,-39)

befallen_92, range=62 (-372,7,-39)

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

ice_boned_skeleton (50%)
ice_boned_skeleton (50%)

befallen_112, range=76 (-401,-2,-67)

befallen_115, range=79 (-449,47,-38)