Go to the North Wing Stacks on the first floor of the Library, then take the teleporter at ( 260, -20, -285 ) Copy/waypoint 260, -20, -285 to the Elemental Portal Gallery. Use the portal at ( 728, 412, -337 ) Copy/waypoint 728, 412, -337 to enter.
Kill a fiery steward near ( -166, 22, 208 ) Copy/waypoint -166, 22, 208.
Kill Kreigor inside a tower at ( -198, 3, -87 ) Copy/waypoint -198.45, 2.60, -87.38
Periodically during the fight Kriegor says, "Time to heat up." Shortly after there is a short duration no-offensive-abilities detriment on the character. (No such thing in Solo, 12/28/18)
Keep your back to a wall so you don't get feared out of the tower. Using Crouch and Walk also help during the fear. (No fear either, 12/28/18)
Bring power and cure trauma potions. Trauma DOT is a heavy power drain. (There was a power drain, but it was minimal in Solo)
Kill a scorched factor around ( -336, 25, -77 ) Copy/waypoint -336, 25, -77
Kill Morgelon the Wilder inside a tower at ( -361, 39, 110 ) Copy/waypoint -361, 38.59, 110.02
Summons trios of greater flame wilders throughout the fight.
Emotes Morgelon the Wilder glares in your direction (frontal?)
Elemental cures needed
Cross the flame bridge and kill (a conflagrant emissary) in the tower at ( -443, 59, 288 ) Copy/waypoint -443, 59, 288
Kill Moracar, the Fiend inside a tower at ( -367, 43, 372 ) Copy/waypoint -366.53, 42.52, 371.70.
Kill unstable spirit globes as they spawn, otherwise they despawn and respawn as much more powerful adds. Multiple unstable spirit globes can spawn at the same time. For classes with few AoEs, save them for the spirits or you will likely run out of time before they despawn.
Kill a seared advocate in the tower at ( -86, 78, 418 ) Copy/waypoint -86, 78, 418 (there are other mobs in the tower as well).
Kill Pyrefist, Dark Guardian and his minions in the tower at ( -235, 88, 404 ) Copy/waypoint -234.98, 88.13, 404.13
Periodically casts a fear.
It is possible to pet pull the adds out of the tower without the named, but far easier to clear the whole area before you spawn him.
Use the red glowing travel portal at ( -193, 98, 436 ) Copy/waypoint -193, 98, 436.
Kill Ra-Sekjet near ( -364, 61, -342 ) Copy/waypoint -364, 61, -342. He is grouped with two adds, Jel-Ekset and Jek-Setek.
Periodically teleports character away. He mostly teleports you to ( -431, 65, -348 ) Copy/waypoint -431, 65, -348, so if you fight him there, it's no inconvenience.
