Level 42-46: Bring 1 Priest 1 Healer 1 Mage 2 anything

Located: Badlands near the entrance from Loch-Modan

Quests:
A sign of hope-Alliance
Power Stones
Agmond's Hope-Alliance
The Lost Dwarves-Alliance
Solution to Doom
Amulet of Secrets
Necklace Recovery-Horde
The Shattered Necklace-Alliance
Uldaman Reagent Run-Horde
Reclaimed Treasures-Horde
Reclaimed Treasures-Alliance
The Lost Tablets of Will-Alliance
Find the Gems and the Power Source-Horde

The Entrance to the dungeon has a number of lvl 36-38 elite dwarves but they should be rather easy. This dungeon is a hard one and you need alot of healing power to beat it.

The Entrance area has Elite Trogg packs but for a group level 42+ they shouldnt pose a problem. After hacking your way through some troggs you will find Revelosh. Revelosh is a mini-boss of sorts and drops half of the staff required to open the secret chamber.

After killing Revelosh head south to find a room with some monsters and 3 dwarves. Next to the dwarf named Baelog is a chest. Open it and take the medallion from inside then head back to Revelosh's room.

Head out of Revelosh's room to the big open room with all the dark iron dwarves. After clearing the room combine the shaft and the medallion and put them into the pedastal in the middle of the miniture city.

This will open the big stone door in the room and let Ironaya out.

As you move through the dig you will find some rooms with swarms of normal low lvl scorpions which require decent AoE to clear out.

Eventually you will find a room with Galgann Firehammer and some minions he can hit hard and hits you with some fire damage. Overall if you have problems with Galgann you wont be able to finish the dungeon.

Continue your way through the dungeon until you find a large room with 2 paths. To the left leads to Grimlok and the other leads to the rest of the dungeon.

Go through to the path to Grimlok and clear out the area before him. Grimlok can be a tough fight your first priority will be to drop the basilisk next to him and kill his guards. Have one tank take on Grimlok while the rest of the party kills his guards. Then focus fire on Grimlok and take him down.

Now head through the other path and clear up to the door. Through the door are 3 rather large patrol groups. Once you have cleared them away prepare yourself for a hard fight and right-click the stone in the middle.

One of the golems will start attacking you, kill him and another will revive and attack going on untill all the golems are dead. After this the door should open and you can continue on.

After about 5-7 patrols you will be in a large room with a giant statue in the middle and a large amount of smaller statues along the walls. This is the final boss fight against Archaedas.

Archaedas is a rather hard fight as during the fight he will revive a number of the statues to come fight and heal him. Have a DPS (Rogue, Mage, Hunter) class take down the statues he summons while the rest of the group beats on Archaedas.

After he has lost a good amount of health he will summon the medium sized statues in the middle of the room. Take these down and return to beating on Archaedas. At around 20% HP Archaedas will summon 2 of the Large statues to help him. Ignore them and focus fire on Archaedas till he dies.

The key to this fight is conserving your mana. After Archaedas falls your done.