NPCs composing that spawngroup :

an_avenging_gazer (100%)

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

airplane_heart_harpie92, range=39 (633,323,-54)

heart_harpie (100%)

airplane_Gorgalosk106, range=63 (608,290,-54)

Gorgalosk (100%)

airplane_a_watchful_guard80, range=92 (695,322,-54)

a_watchful_guard (100%)

airplane_a_shimmering_meteor81, range=55 (635,402,141)