I just played this quest with a new group: Elf, Berserker, Explorer & Rogue.
This one I liken to "Murphy's Quest" as anything can go wrong most certainly almost did. The treasure deck was so unkind.
The first thing the Berserker drew from the Treasure Deck was a Wandering Monster. Filthy Abomination followed the heroes in through the stairwell. But the Berserker avoided damage with 2

s!
In the next room after the goblins were killed the Explorer draws a Hazard! But wait, Danger Sense kicks in and her gets a redraw: Hazard again!
Out into the long hallway I placed an Orc Archer. The Explorer makes the first charge down the hallway since she has TrapSmith ability, while the Rogue throws Daggers, but none take out the Orc Archer. The Elf covers the Explorer with his Disappear spell. So when it's the Archer's turn he hits the Rogue. On the Explorer's next turn she rolls a

, cancelling the Disappear spell. The Rogue managed to get 1

with a throwing dagger, but the Orc Archer blocked and fired an arrow into the Explorer. The Explorer and Rogue finally make it down the hall, killing the Orc Archer. The Berserker and Elf lagged on their movement.
Explorer leads the charge into the next room. TrapSmith activates as she goes in for the attack against the two Orcs. The Rogue and Explorer took them both out. On the Explorer's next turn she goes to disarm the spear trap:

! Followed by

! The Explorer's skills are failing her and she's down to 2BP.
Rogue searches for treasure and draws Poison! But rolled

to keep his mind point.
Elf & Berserker finally make it as they continue to the next room and take out the next 2 Orcs. Berserker searches for treasure and draws another Wandering Monster! The Abomination lands

on its initial attacks, and

on its 2nd attack, bringing the Berserker down to 2 Body Points, she uses Retaliation, and doesn't roll a single

! After all 4 heroes trying they finally kill the Abomination.
Into the following hallway the Explorer's TrapSmith goes off and she successfully disarms the pit traps. Berserker and Elf take out the goblins in the torture rack room while the Rogue and Explorer check out the little closet, Explorer finds a Potion of Healing. Considering both she and the Berserker are down to 2 Body Points and this is their only Healing Potion, everyone insists she give it to the Berserker, who does most of the fighting.
The Elf also finds a Heroic Brew in the Torture Rack room.
The Explorer leads the way, discovering the traps in the mini hallway, so the heroes decide to take the other door and kill and Orc in that room. Berserker draws Hazard from the treasure deck, dropping to 1 Body Point. She drinks the Potion of Healing for

, up to 3BP.
Into the room with the Secret Door the Rogue draws 15 gold from the treasure deck, Berserker finds the secret door.
The heroes proceed cautiously, careful with their checks and spot the spear trap, which the Explorer disarms. Into the room with 3 Orcs the heroes are able to subdue all 3 without taking any further damage. But the Elf's treasure search yields a Wandering Monster, and the Abomination robs the Elf of 3 Body Points before they take them out.
Out in the hallway the Explorer takes out the Orc guarding the entrance to Gulthar's room. Knowing the center room is probably the boss room the heroes prepared for a final assault. The Rogue passes his Potion of Magic Resistance (found in a previous quest) to the Berserker.
The Explorer leads the charge to utilize TrapSmith, none detected as she takes out a Goblin. Elf follows in and drops a grsnage, casting Hypnotic Blaze. Explorer rolls a

, unaffected! An Orc, Abomination and Gulthar all roll a

! The 2nd Orc rolls a

and the remaining Goblin gets a

, the only monster to resist the spell. The Berserker drank the Potion of Magic Resistance to avoid the effects. Rogue rolled a

.
Berserker ran in and activated Frenzy against the hypnotized Orc, Abomination and the unaffected Goblin, clearing them all out in 1 swoop. The Explorer took out the last hypnotized Orc. Gulthar was defenseless for 2 more turns, handing the win to the heroes. The Explorer found Jewels when searching this room, activating Treasure Hunter as well.
It started off dire but the Heroes had the best luck at the end.