NPCs composing that spawngroup :

an_inferno_mephit (50%)

a_lava_mephit (50%)

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

solrotower2120020, range=132 (-1852,1927,290)

an_inferno_mephit (100%)

solrotower2120022, range=75 (-1693,2006,282)

a_molten_magmin (50%)
a_scorched_magmin (50%)

solrotower2120023, range=135 (-1601,2000,286)

a_whirl_of_embers (50%)
a_whirl_of_magma (50%)

solrotower2120035, range=184 (-1716,1752,289)

an_inferno_mephit (100%)

solrotower2120037, range=93 (-1718,1843,289)

a_fire_mephit (100%)

solrotower2120038, range=111 (-1640,1858,291)

a_whirl_of_cinders (100%)

solrotower2120045, range=189 (-1535,1978,289)

an_inferno_mephit (50%)
a_flame_mephit (50%)

solrotower2120046, range=48 (-1672,1939,284)

an_ember_magmin (90%)
a_fervid_magmin (10%)

solrotower2120047, range=87 (-1633,1941,289)

an_inferno_mephit (100%)

solrotower2120048, range=128 (-1631,2028,288)

a_molten_magmin (50%)
a_scorched_magmin (50%)

solrotower2120050, range=193 (-1775,1750,289)

an_inferno_mephit (100%)

solrotower2120051, range=120 (-1801,1847,291)

solrotower2120052, range=138 (-1792,1818,291)

an_inferno_mephit (100%)

solrotower2120360, range=68 (-1669,1982,280)

a_flame_frog (100%)

solrotower2120391, range=138 (-1837,1860,288)

a_flame_mephit (100%)

solrotower2120392, range=133 (-1700,2067,291)

a_flame_mephit (100%)