Trial of the Crusader Raid Guide - Lord Jaraxxus

Before beginning the boss battle with Lord Jaraxxus you need to have clear assignments for your group. It is best to have the less geared of your tanks tanking the boss. Ideally this should be a Warrior or Death Knight that has reliable and frequent interrupts. Another melee DPS needs to also commit to being on the boss the entire time, like a Rogue, Warrior, or Death Knight. Together the Lord Jaraxxus tank and the assigned melee DPS need to interrupt all of the Fel Fireballs that Jaraxxus tries to cast.

You also need to designate a more AoE oriented tank to picking up adds. Throughout the fight a couple of different types of adds will spawn - Mistresses of Pain and Infernals. Mistresses of Pain can be tanked, but Infernals drop aggro frequently. The add tank should try to hold them as much as possible.

Healers need to be sure to have the entire room covered. The best practice is to mark healers and have them pick an area of the room that will be theirs. Raid members need to be sure to stay away from eachother throughout the fight, but especially stay away from the healers.

As usual, speak to the guy by the door to start the boss fight. This intro is kind of long - Wilfred Fizzlebang comes out and tries to summon a Doomguard, and instead summons an Eredar Lord. Good times. Wilfred pays for that mistake with his life, but you've fought demons before. It's no big thing.

Tank Jaraxxus in the center of the room. The rest of the raid needs to give eachother a 10-15 yard space between them or his Fel Lightening will chain. The more people it hits, the more damage it does. It can very easily one shot someone if they're in the wrong place at the wrong time. Again, make sure that the tank and melee DPS is interrupting the Fel Fireballs. If they hit the tank, it will leave a heavy DoT on him. If one goes off, the DoT is a magic effect that can be removed by Priests and Paladins.

Also, throughout the fight Jaraxxus will buff himself with Nether Power, increasing his magic damage by 20% per stack of Nether Power. This is best spell-stolen by Mages, but you need to have a backup method for removing it if a Mage isn't present or dies. It can be removed with Purge or Dispell.