NPCs composing that spawngroup :

bristleweb_spider (100%)

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

kaesora_2, range=181 (293,262,-109)

kaesora_4, range=12 (148,172,-69)

kaesora_5, range=108 (145,62,-61)

kaesora_6, range=89 (147,81,-61)

kaesora_7, range=129 (135,40,-61)

bristleweb_spider (50%)
strathbone_healer (50%)

kaesora_8, range=30 (148,142,-64)

kaesora_9, range=106 (175,71,-61)

kaesora_12, range=97 (120,74,-61)

briarweb_spider (50%)
ravener (50%)

kaesora_27, range=172 (54,18,3)

strathbone_healer (100%)

kaesora_28, range=70 (88,117,35)

minion_of_Xalgoz (50%)
spectral_guardian (50%)