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=63 (1060,-1650,17)

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

akheva1432085, range=93 (1100,-1650,17)

Centi_Thall (50%)
Xin_Xakra (50%)

akheva1432075, range=21 (1034,-1715,19)

Sheleric_Vis (100%)

Xin`Xakre_1433591, range=41 (1060,-1709,19)

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

The_stones_1433660, range=82 (1000,-1619,19)

The_stones_1433662, range=80 (1015,-1619,19)

The_stones_1433664, range=40 (1020,-1739,19)

The_stones_1433665, range=20 (1020,-1719,19)

The_stones_1433667, range=80 (1030,-1619,19)

The_stones_1433669, range=83 (1045,-1619,19)

The_stones_1433671, range=56 (1060,-1739,20)

The_stones_1433672, range=89 (1060,-1619,19)

The_stones_1433674, range=97 (1075,-1619,19)

The_stones_1433677, range=89 (1100,-1739,20)

The_stones_1433678, range=82 (1100,-1719,20)

The_stones_1433679, range=80 (1100,-1699,19)

SheiTrap, range=70 (1085,-1672,18)