NPCs composing that spawngroup :

#The_Insanity_Crawler_ (25%)

Shadows (25%)

The_stones (25%)

You_can_feel (25%)

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

akheva1432086, range=99 (1060,-1650,17)

Centi_Thall (34%)
Xin_Thall (33%)
Xin_Thall (33%)

akheva1432085, range=71 (1100,-1650,17)

Centi_Thall (50%)
Xin_Xakra (50%)

akheva1432074, range=13 (1128,-1714,19)

Sheleric_Vis (100%)

akheva1432073, range=95 (1136,-1804,17)

Vius_Tatrua (100%)

Xin`Xakre_1433591, range=80 (1060,-1709,19)

Shadows (34%)
The_stones (33%)
You_can_feel (33%)

The_stones_1433671, range=85 (1060,-1739,20)

The_stones_1433677, range=50 (1100,-1739,20)

The_stones_1433678, range=41 (1100,-1719,20)

The_stones_1433679, range=41 (1100,-1699,19)

The_stones_1433680, range=96 (1105,-1619,19)

The_stones_1433682, range=92 (1120,-1619,19)

The_stones_1433684, range=90 (1135,-1619,19)

The_stones_1433686, range=30 (1140,-1739,19)

SheiTrap, range=66 (1085,-1672,18)