NPCs composing that spawngroup :

The_Insanity_Crawler (100%)

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

akheva1432086, range=33 (1060,-1650,17)

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

akheva1432085, range=26 (1100,-1650,17)

Centi_Thall (50%)
Xin_Xakra (50%)

akheva1432075, range=66 (1034,-1715,19)

Sheleric_Vis (100%)

akheva1432074, range=60 (1128,-1714,19)

Sheleric_Vis (100%)

Xin`Xakre_1433591, range=44 (1060,-1709,19)

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

The_stones_1433662, range=87 (1015,-1619,19)

The_stones_1433664, range=93 (1020,-1739,19)

The_stones_1433665, range=80 (1020,-1719,19)

The_stones_1433666, range=70 (1020,-1699,19)

The_stones_1433667, range=76 (1030,-1619,19)

The_stones_1433668, range=91 (1030,-1599,19)

The_stones_1433669, range=66 (1045,-1619,19)

The_stones_1433670, range=83 (1045,-1599,19)

The_stones_1433671, range=71 (1060,-1739,20)

The_stones_1433672, range=58 (1060,-1619,19)

The_stones_1433673, range=77 (1060,-1599,19)

The_stones_1433674, range=53 (1075,-1619,19)

The_stones_1433675, range=73 (1075,-1599,19)

The_stones_1433676, range=73 (1090,-1599,19)

The_stones_1433677, range=68 (1100,-1739,20)

The_stones_1433678, range=49 (1100,-1719,20)

The_stones_1433679, range=30 (1100,-1699,19)

The_stones_1433680, range=56 (1105,-1619,19)

The_stones_1433681, range=75 (1105,-1599,19)

The_stones_1433682, range=63 (1120,-1619,19)

The_stones_1433683, range=80 (1120,-1599,19)

The_stones_1433684, range=72 (1135,-1619,19)

The_stones_1433685, range=88 (1135,-1599,19)

The_stones_1433686, range=86 (1140,-1739,19)

The_stones_1433687, range=66 (1140,-1709,19)

The_stones_1433688, range=97 (1150,-1599,19)