NPCs composing that spawngroup :

a_grimling_manacrafter (34%)

a_grimling_mystic (33%)

a_grimling_overseer (33%)

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

HollowshGremlina_grimling_mysi, range=74 (-2606,-631,12)

a_grimling_mystic (100%)

HollowshGremlina_grimling_look, range=89 (-2659,-590,28)

a_grimling_lookout (100%)

HollowshGremlina_grimling_over, range=28 (-2684,-660,36)

a_grimling_overseer (100%)

HollowshGremlina_grimling_mysc, range=27 (-2689,-688,23)

a_grimling_mystic (100%)

HollowshOwls_12craf, range=0 (-2662,-679,18)

HollowshOwls_oversee, range=28 (-2684,-660,36)

an_owlbear_bonegrinder (100%)

HollowshOwls_lookout, range=89 (-2659,-590,28)

an_owlbear_ravager (100%)

HollowshOwls_0005, range=74 (-2606,-631,12)

HollowshOwls_006, range=27 (-2689,-688,23)

an_owlbear_bonegrinder (100%)

HollowshWolvesamana4, range=0 (-2662,-679,18)

a_sonic_warwolf (100%)

HollowshWolvesa__oversee, range=28 (-2684,-660,36)

HollowshWolvesa__lookout, range=89 (-2659,-590,28)

HollowshWolvesa_505, range=74 (-2606,-631,12)

HollowshWolvesa_506, range=27 (-2689,-688,23)