NPCs composing that spawngroup :

#Hoklan_the_Dreaded (20%)

a_savage_skeletal_sailor (80%)

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

gunthak2240013, range=193 (-1035,-659,19)

an_emaciated_zombie (50%)
a_vicious_skeleton (50%)

gunthak2240018, range=163 (-866,-666,19)

gunthak2240346, range=195 (-1037,-978,19)

gunthak2240369, range=160 (-820,-939,19)

a_deadly_skeletal_sailor (50%)
a_savage_skeletal_sailor (50%)

gunthak2240384, range=104 (-990,-736,19)

an_emaciated_zombie (50%)
a_pestilent_troll_zombie (50%)