NPCs composing that spawngroup :

#Zycem_the_Scorched (50%)

a_Delve_evoker (50%)

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

delvea3410136, range=35 (664,-1712,10)

delvea3410137, range=79 (589,-1733,11)

a_domesticated_basilisk (50%)
a_domesticated_basilisk (50%)

delvea3410150, range=28 (651,-1652,57)

a_Delve_diviner (50%)
a_Delve_diviner (50%)

delvea3410151, range=37 (678,-1702,56)

a_Delve_evoker (50%)
a_Delve_evoker (50%)

delvea3410152, range=93 (741,-1688,54)

a_Delve_drake (50%)
a_Delve_drake (50%)

delvea_monocle_1_42, range=34 (664,-1711,10)

a_Delve_diviner (50%)

delvea_monocle_1_43, range=78 (589,-1732,13)

a_Delve_spellbinder (50%)

delvea_monocle_4_2, range=34 (664,-1711,10)

a_Delve_drake (50%)

delvea_monocle_4_4, range=78 (589,-1732,13)

a_Delve_drake (50%)

delvea_monocle_5_42, range=34 (664,-1711,10)

a_Delve_diviner (50%)

delvea_monocle_5_43, range=78 (589,-1732,13)

a_Delve_evoker (50%)

delvea_monocle_6_63, range=34 (664,-1711,10)

a_Delve_spellbinder (50%)

delvea_monocle_6_64, range=78 (589,-1732,13)

a_Delve_drake (50%)