Yor'sahj the Unsleeping DPS Strategy Guide (Heroic Mode included)

Boss Icon - Yor'sahj the Unsleeping
Introduction

This guide is intended to provide a comprehensive description of the encounter with Yor'sahj the Unsleeping in Dragon Soul. It is mostly targeted to DPS who desire to have a short but detailed overview of what is expected of them during that fight.

This guide is updated for World of Warcraft MoP 5.4.

The Yor'sahj the Unsleeping encounter presents its highest degree of difficulty to the raid leader, who must make certain decisions during the fight. The other roles, including DPS, have a much easier time during this fight.

As a DPS player, you will divide your time between attacking the boss and the adds he summons. Additionally, you will be required to stack on the boss (most often) or spread out (rarely).

1. Overview of the Fight↑top

The Yor'sahj encounter is essentially a single phase fight. The encounter is unique, in the sense that Yor'sahj has only one ability, which he casts with regularity.

Additionally, Yor'sahj will regularly summon 3 random oozes of a different type (out of 6 possible types). Upon reaching the boss, each ooze buffs the boss, granting him a specific ability that lasts 60 seconds. When there are about 15 seconds left on his buffs, the boss begins summoning the next set of 3 oozes.

Your raid can only kill one of the three oozes each time (as soon as one dies, the other two become immune), so you will have to deal with the combination of the abilities that the two surviving oozes grant the boss.

2. Strategy↑top

The strategy for DPS can be summarised as follows.

  • When oozes spawn, DPS the designated ooze immediately (your raid leader will tell you which one to kill).
    • if Yor'sahj absorbs a Black ooze, stack close to the boss and AoE down the adds.
    • if Yor'sahj absorbs a Blue ooze, kill the Mana Void (absolute priority).
    • if Yor'sahj absorbs a Red ooze, stack close to the boss.
    • if Yor'sahj absorbs a Yellow ooze, stack close to the boss.
    • if Yor'sahj absorbs a Green ooze
      • 10-man/25-man difficulties: spread out at least 4 yards from other players;
      • LFR: there are no additional tasks to perform.
    • if Yor'sahj absorbs a Purple ooze, there are no additional tasks to perform.
  • Whenever you are not busy attacking an add, attack Yor'sahj.

3. Heroic Mode↑top

The main difference between the Normal and Heroic versions of the encounter with Yor'sahj is that your raid will have to kill 1 of 4 oozes (instead of 1 of 3), which means that Yor'sahj will be empowered by 3 oozes.

Other that that, all abilities deal more damage and all units have more health (including the boss).

As a DPS, you will find that the fight is extremely similar to the Normal version. The difficult part is the 10-minute enrage timer, which will probably be very tight as you progress on the fight. Fortunately, there are a few tricks that you raid can make use of to beat it.

3.1. Beating the Enrage Timer

Precious seconds can be saved in the way you will handle the oozes, the Forgotten Ones, and the Mana Void.

3.1.1. Killing the Oozes

Killing the oozes might not require the entire contingent of DPS. The idea is to kill the ooze close to the boss, and not half-way through (which would mean that some DPS that were sent to kill it would have been better employed on the boss). Therefore, it is possible that your raid leader will ask you to remain on the boss when the oozes are up, especially if your class is not capable of doing high burst damage.

3.1.2. Killing the Forgotten Ones

When the Forgotten Ones spawn (which will happen in all combinations, save one), you should not specifically AoE them down. Rather, only classes that can spread their damage on the boss to the adds (for example, Combat Rogues with Blade Flurry Icon Blade Flurry, Fire Mages with Inferno Blast Icon Inferno Blast and Combustion Icon Combustion) or that can spread their damage on the adds to the boss (for example, Enhancement Shamans with Lava Lash Icon Lava Lash, Flame Shock Icon Flame Shock, and Fire Nova Icon Fire Nova) should bother with the Forgotten Ones.

3.1.3. Kill the Mana Void

The idea is to survive with rather low mana for one phase or two, until you get a second Mana Void (something that should happen quickly enough as 4 of the 6 combinations have blue). Then, as soon as the second Mana Void has depleted all casters of their mana, the first Mana Void should be killed. Hopefully it will be on low health, after taking a bit of damage now and then.

After that, you should keep the second Mana Void as a means of re-filling your raid's mana after the third Mana Void spawns and so on. All in all, this will save you the trouble of killing one Mana Void. Since they have a significant health pool, this will prevent you from wiping to the enrage timer at 2% health.