NPCs composing that spawngroup :

a_phase_spider (33%)

a_phase_spider (33%)

a_phase_spider (34%)

NPCs spawning around that spawngroup :
(Max range : 200)

Vaniki, range=189 (576,-701,-196)

Vaniki (10%)
Vaniki_placeholder (90%)

necropolis_6, range=175 (588,-708,-195)

necropolis_37, range=100 (831,-783,7)

necropolis_53, range=153 (755,-656,-256)

a_Chetari_worker (100%)

necropolis_101, range=199 (931,-828,-256)

a_Chetari_warrior (50%)
a_Chetari_worker (50%)

necropolis_115, range=81 (814,-813,-256)

a_Chetari_guard (100%)

necropolis_116, range=174 (701,-635,-256)

a_Chetari_guard (100%)

necropolis_117, range=195 (716,-612,-256)

a_Chetari_guard (100%)

necropolis_120, range=159 (636,-680,-255)

a_Chetari_Dominator (50%)
a_Chetari_Dustshaper (50%)

necropolis_154, range=153 (820,-681,-255)

a_Chetari_warrior (50%)
a_Chetari_warrior (50%)

an_inactive_trap_190106, range=155 (812,-673,-253)

an_inactive_trap_190108, range=165 (897,-828,-253)