NPCs composing that spawngroup :

fire_goblin (33%)

inferno_goblin (33%)

inferno_goblin_wizard (34%)

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

soldunga_32, range=90 (-781,-630,57)

soldunga_31, range=94 (-756,-595,57)

soldunga_30, range=78 (-887,-634,57)

inferno_goblin (50%)
inferno_goblin (50%)

soldunga_21, range=89 (-781,-506,57)

inferno_goblin_shaman (100%)

soldunga_19, range=29 (-846,-538,43)

soldunga_18, range=75 (-902,-517,26)

young_goblin (100%)

soldunga_17, range=92 (-912,-501,14)

inferno_goblin (100%)

soldunga_16, range=82 (-911,-515,15)

fire_goblin (100%)

soldunga_15, range=82 (-850,-485,22)

fire_goblin (50%)
inferno_goblin (50%)