NPCs composing that spawngroup :

an_elder_lavaspinner (50%)

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

delvea3410020, range=58 (-1247,-1277,-91)

delvea3410174, range=0 (-1191,-1259,-92)

a_reclusive_lavaspinner (50%)
a_reclusive_lavaspinner (50%)

delvea_monocle_2_22, range=57 (-1246,-1276,-91)

an_elder_lavaspinner (50%)
an_elder_lavaspinner (50%)

delvea_monocle_2_23, range=0 (-1191,-1259,-92)

a_reclusive_lavaspinner (50%)
a_reclusive_lavaspinner (50%)

delvea_monocle_3_23, range=57 (-1246,-1276,-91)

a_reclusive_lavaspinner (50%)

delvea_monocle_4_73, range=57 (-1246,-1276,-91)

an_elder_lavaspinner (50%)

delvea_monocle_4_83, range=0 (-1191,-1259,-92)

a_reclusive_lavaspinner (50%)

delvea_monocle_7_23, range=57 (-1246,-1276,-91)

an_elder_lavaspinner (50%)

delvea_monocle_7_24, range=0 (-1191,-1259,-92)

an_elder_lavaspinner (50%)

delvea_monocle_8_5, range=57 (-1246,-1276,-91)

an_elder_lavaspinner (50%)

delvea_monocle_8_6, range=0 (-1191,-1259,-92)

an_elder_lavaspinner (50%)