The first room has a named, Commander Vazkurlack Primescale (100^). Clear the room first. Be wary of some of the droags; they either have a massive knockback or will cast a huge damage spell that may insta-kill you. The warning for the damage spell is a message stating that the air around you grows crisp, and then you'll see a yellow glowing ring on the floor. GET OUT OF THE RING!
Kill the Commander. He has a rare high damage spell called "Primescale" (this dealth 28k damage to us) and will place traps occasionally during the fight (these are like floating landmines, just move out of the way).
Take the southern hallway. This leads to the next named, Frost.
Take the northern hallway. The vigilant constructs along here "rise up" from death and have to be killed twice.
Inside the Sanctum of Fire is Pyre (100^). Clear his room of constructs before engaging him.
During the fight you will receive multiple texts about Pyre. When this occurs a mob will spawn from a column.
Kill the mob that spawns from one of the columns in the room ASAP or he will soon unleash some major damage upon you. Take note that tab targeting doesn't work very well here, so be prepared to turn off autoattack so you can run to the spawns more easily.
Once all four events occur he will be fully weakened and will die.
You may now use the Recall Obelisk in the center of the room to go back to the entrance.
Before fully clearing the room, play with the pillars to get accustomed to how they function. In a nutshell, the first click makes the red beam appear, the second click makes the blue beam appear, and the third click resets the pillars.
Near the center of the room are four pillars--two red, two blue.
Get the statue to the center pedestal when you need to counter him.
Whenever the statue has a red aura up, counter it with a blue pillar.
Whenever the statue has a blue aura up, counter it with a red pillar.
When dragging him into the aura, make sure he remains there until the message states that his cerulean aura dissipates.
You may now use the Recall Obelisk at the back of the platform to go back to the entrance.