1 - GUARD spawns in wrong room mostely ! (It needs a static NPC in the right room)
2 - DEMON (its not players level and need a fix, because point 3 in this list)
3 - PETS - there is a sign in front of the demons room to leave pets. BUT that function is disbaled by developers/GMs/Compbatant) Pets will die there ALLWAYS, because noone can leave them.
In earler time pets can be filled with a lot pots and parked in front of the door. and the demon could be defeaded by healing- or manapots using.
Now pets where no longer available there or DIE there, and noone can use pots there, that means the point 2 (the DEMON) need a fix to get a chance to defead that demon without pots.
I tried it by myself many days with any character class and different settings.
I tried to do a walkthrough of it, but there is no chance to make it.
Its vs Rule to kill pets from players (the park function not works !)
its vs Rule to decrease players fun (afer such a long time players get frusted by BUGS and such a demon who is not same level like a player)
If this is not understandable than contact me. I will try to explain what i mean in my language (german).
Many players told me what i have to do, but it not worked.
They tested it by themself too, and...I was right ! It not works like before

Only a healer (mage) in front of that room can heal you if you go out, healing, and fast in and hope that demon is still there.
Thats THE ONLY WAY TO DO THIS QUEST at the moment !
DEVELOPERS SHOULD OVERWORK IT !
......
lets discuss about this quest / questline
own happenings.
own experiences
and so on.
It was long ago, that this quest was on focus.
Same is that the chest after the demon will fool all players who are new ! (after such a long time investment!)
There must be an info that noone should open chest before 2k, or they NEVER get a weapon 2k+2 after they are 2k.