NPCs composing that spawngroup :

bristleweb_spider (33%)

ravener (34%)

strathbone_spider (33%)

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

kaesora_6, range=19 (147,81,-61)

kaesora_7, range=23 (135,40,-61)

bristleweb_spider (50%)
strathbone_healer (50%)

kaesora_8, range=80 (148,142,-64)

kaesora_9, range=31 (175,71,-61)

kaesora_12, range=27 (120,74,-61)

briarweb_spider (50%)
ravener (50%)

kaesora_28, range=79 (88,117,35)

minion_of_Xalgoz (50%)
spectral_guardian (50%)