The Assembly of Iron - Hard Mode (I Choose You, Steelbreaker)

Differences: Killing Steelbreaker last is the Hard Mode. His abilities increase after Runemaster Molgeim and Stormcaller Brundir are each defeated.

Sources of Raid Damage

Similar to normal mode with a few extra abilities.

High Voltage: 3k Nature damage every 3 seconds which comes from Steelbreaker and is now present through the entire encounter.

Fusion Punch: Same mechanic as normal mode and top priority for dispelling off the Steelbreaker tank as soon as it's applied. Will lead to a wipe if missed for even a few seconds.

As each boss dies, the others gain a 25% damage increase from Supercharge.

Two healers should be assigned to the Steelbreaker tank, preferably have a Shadowpriest dispel Fusion Punches as healing gets very intensive as the fight goes on, mana can be an issue if you're not careful. One healer can look after the offtank (Runemaster and Stormcaller tank) as they require little healing in P1 and 2, and none in P3 obviously and they should be able to raid/MT heal in P3. Two raid healers (3 if running six healers and can afford the dps) to cover the Nature Aura.

When one member of the council dies he gains the Static Disruption ability, nows the time to have 2-3 range 'soaking' this debuff as it is only applied to players outside melee range. Warlocks and Shadowpriests are ideal but we've been alright with the two MT healers and a Warlock. MT healers advantage is they don't need to run and heal/dispel during Stormcaller Brundir's Overload. All his Chain Lightning casts should be interupted, so the only healing is the High Voltage Nature Aura, Fusion Punch and Static Disruption.

When the second member of the council goes down he gains some more abilities, and healing really steps up a notch.

Overwelming Power is debuffed on the MT and their size and damaged increased by 200%. After 35 seconds they Meltdown, which means they die and kill anyone within 15 yards.

Electrical Charge increases Steelbreaker's damage by 25% and also will heal him if anyone in the raid dies. It's worth noting that Mortal Strike effects work but depending when this happens it's usually a wipe.

Lots more raid damage, and lots more tank damage, if the previous phase with two alive didn't wake you up a hatred of the global cooldown arises here as it really becomes a 'spamfest'. Tank healers will be going all out and this is the phase for cooldowns, such as Pain Suppression, Guardian Spirit, Divine Sacrifice etc, while raid healers will be dealing with great raid damage from the nature aura. Grid will look like a graphic equalizer.

After 30 seconds the MT will need to run out to take his death from Meltdown, be ready to swaphealing to the OT as he picks up Steelbreaker. They MT may be rezzed and will need fast heals and rebuffs. Remember, Electrical Charge heals Steelbreaker if anyone dies.

Dps are on the clock now to burn him down before anyone dies, the hard enrage is 15 minutes from the encounter start but it's more likely a raid member will die and allow Steelbreaker to heal and a wipe is called.

There is a lot going on in this hardmode and is a good indicator of your own gear/regen and playstyle.