NPCs composing that spawngroup :

an_inferno_mephit (100%)

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

solrotower2120022, range=88 (-1693,2006,282)

a_molten_magmin (50%)
a_scorched_magmin (50%)

solrotower2120023, range=67 (-1601,2000,286)

a_whirl_of_embers (50%)
a_whirl_of_magma (50%)

solrotower2120037, range=129 (-1718,1843,289)

a_fire_mephit (100%)

solrotower2120038, range=83 (-1640,1858,291)

a_whirl_of_cinders (100%)

solrotower2120039, range=173 (-1461,1965,289)

an_inferno_mephit (100%)

solrotower2120041, range=87 (-1720,1936,294)

an_inferno_mephit (50%)
a_lava_mephit (50%)

solrotower2120045, range=104 (-1535,1978,289)

an_inferno_mephit (50%)
a_flame_mephit (50%)

solrotower2120046, range=39 (-1672,1939,284)

an_ember_magmin (90%)
a_fervid_magmin (10%)

solrotower2120048, range=87 (-1631,2028,288)

a_molten_magmin (50%)
a_scorched_magmin (50%)

solrotower2120051, range=192 (-1801,1847,291)

solrotower2120360, range=54 (-1669,1982,280)

a_flame_frog (100%)

solrotower2120390, range=187 (-1449,1973,289)

a_lava_mephit (100%)

solrotower2120392, range=143 (-1700,2067,291)

a_flame_mephit (100%)