NPCs composing that spawngroup :

Xalamesh_Dur`Kven (100%)

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

skyshrine_98, range=39 (550,-290,43)

Welenor (50%)
Welenor (50%)

skyshrine_99, range=37 (578,-290,43)

Lumburus (50%)
Lumburus (50%)

skyshrine_110, range=55 (605,-366,43)

Ortoth (100%)

skyshrine_112, range=43 (582,-366,43)

Tasznev (50%)
Tasznev (50%)

skyshrine_118, range=77 (489,-337,43)

Flanto (50%)
Flanto (50%)

skyshrine_119, range=77 (489,-314,43)

Fiif (50%)
Fiif (50%)

a_patient_servant_189886, range=8 (558,-327,48)

A_Guardian_of_the_Shrine (100%)

Invisman_189958, range=43 (609,-325,28)

Invisman (100%)

skyshrine_112917, range=28 (538,-333,28)