NPCs composing that spawngroup :

a_champion_risker (100%)

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

devastation65689, range=25 (780,1876,16)

devastation66348, range=46 (775,1910,20)

devastation66526, range=28 (780,1882,8)

devastation66528, range=44 (781,1904,20)

devastation66572, range=85 (676,1893,10)

devastation66617, range=75 (691,1904,14)