NPCs composing that spawngroup :

a_rock_sentinel (100%)

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

thundercrest_monocle_256, range=156 (-294,2470,177)

thundercrest_monocle_264, range=181 (-631,2474,177)

thundercrest_monocle_270, range=151 (-498,2311,177)

thundercrest_monocle_278, range=123 (-439,2332,183)

thundercrest_monocle_280, range=128 (-486,2332,183)

thundercrest_monocle_282, range=166 (-476,2291,177)

thundercrest_monocle_8_2, range=123 (-439,2332,183)

thundercrest_monocle_8_48, range=156 (-294,2470,177)

thundercrest_monocle_8_59, range=188 (-631,2401,177)

thundercrest_monocle_8_61, range=166 (-476,2291,178)

thundercrest_monocle_11_3, range=123 (-439,2332,183)

thundercrest_monocle_11_21, range=156 (-294,2470,177)

thundercrest_monocle_11_24, range=181 (-631,2474,177)

thundercrest_monocle_11_25, range=188 (-631,2401,177)

thundercrest_monocle_11_33, range=166 (-476,2291,178)

thundercrest_monocle_12_35, range=123 (-439,2332,183)