Leave Deaphus in the first room
and head as far right as you can, then approach the only PoP available.
Bait the demon to follow you back to Deaphus.
As soon as you get close to Deaphus, Aurax will become invisible and the Demon will stop where he is, confused.
You can now sneak past and sit on the unguarded PoP for as long as you care to.
The only way to escape the central chamber is with the thief lord's help.
Dispose of the two demons first.
The easiest way is to cast pestilence on them, wait, then finish them off.
Use a totem of resurrection
if you want to resurrect them on your own team.
Grab the 3 mana sprites in the central room 
Now release the Thief Lord. Krish is located in a cell in the north-east .
He will open the secret wall on the left to allow Aurax to escape the central chamber.
Leave some creatures and a totem of resurrection to guard the PoP before you leave the area.
building up a force
Head to the south-west and take over posession of the second PoP.
With two PoPs now under your control,
build up mana and an army of
for as long as you want to wait.
Add a totem of resurrection as protection too.
You are safe during this time.
Only when you head north will the next trigger be activated.
When Aurax heads north, a trigger will be activated.
Krish will then head north to find Glut, and get himself killed in the process.
From then on, The prison warden will be on the loose.
The easiest way to kill Glut is by stealth.
Stay invisible using Deaphus' help, and wander around the prison.
When you find him, unload all the lightning you can on his head,
or for a slow death cast pestilence upon him.
Collect the key from where he dies, or you will not be able to escape the prison via the portal.
Collect the two talismans too.
release your allies
The contents of each cell are not known until you open the cell doors.
To do so can be dangerous, since many contain enemy creatures.
Only open the cells you need to.
The cell marked  contains Nadia,
and the cell marked  contains Vex.
I can't escape?!
You will not be allowed to escape until all conditions have been satisfied.
Glut must be dead, the key must have been collected,
and Vex and Nadia must be released,
otherwise the portal  will not open.
Despite the 'use' icon, the door itself never opens - don't waste your time trying.
Before releasing Krish,
go to the gate to the north with the lever on the other side.
Summon a creature through the bars and make it walk up the corridor
then turn right, reaching a room with a PoP in it.
Force attack the enemy demons (press 'a' while right clicking them)
and watch as you creature upgrades.
This is especialy sweet if you use a
vampire, and the chief vampire will raise the demons back to life!
However, do not be tempted to kill Glut with this cheat. You need him/Krish to open doors for your eventual escape.