NPCs composing that spawngroup :

Corrupted_Knight (95%)

Deathbone_Archmagus (1%)

Elite_Corrupted_Knight (1%)

Elite_Death_Knight (1%)

Firebone_Archmagus (1%)

Pestilence_Archon (1%)

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

codecay2000021, range=35 (-113,384,-54)

#_Carprin_Deatharn (100%)

codecay2000056, range=61 (-32,344,-59)

codecay2000058, range=69 (-147,385,-59)

codecay2000059, range=83 (-155,353,-59)

codecay2000106, range=83 (-84,468,-54)

codecay2000113, range=57 (-79,328,-59)

codecay_275202, range=86 (-28,314,-261)