Dead Men Walking

Abilities:
Gothik the Harvester

• Gothik the Harvester comes down 4:30 after engaging.
  
• Hitpoints: 325k only
  
• Attacks:
  • Shadowbolt single target
    
  • Harvest Soul Can not be dispelled, will decrease your stats by 10% (including mana and health), can stack, so you need to kill him fast.
  
  

Whenever you kill a mob in the outer room, 1-2 mobs will spawn in the inner room. Unrelenting Trainee spawns a Spectral Trainee, Unrelenting Deathknight spawns a Spectral Deathknight, Unrelenting Rider spawns a Spectral Rider and a Spectral Horse.
You need to divide you raid into 2 groups for outer room and inner room, kill mobs as they spawn.
 
Unrelenting Trainee

• Hitpoints: ~2500
  
• Attacks:
  • Basic melee attack - Aprox 250-350dmg.
    
  • Eagle Claw - An attack like rend which stacks.
    
  • Knockdown - Short knockdown/stun
  
  

Unrelenting Deathknight

• Attacks:
  • Basic melee attack - Aprox 800dmg.
    
  • Intercept - 20ish damage, stuns you for a short period.
    
  • Shadow Mark - Melee attack which hits for about 1000 on the tank. Shadow Mark lasts for 15 seconds and allows you to be hit by the Deathriders Shadow Bolt Volley.
  
  

Unrelenting Rider

• Attacks:
  • Basic melee attack - ?dmg.
    
  • Unholy Aura - 400 shadow damage.
    
  • Shadow Bolt Volley - Hits people afflicted by Shadow Mark. Hits for 3200 shadow damage. 5 Second cast time?
  
  

Spectral Trainee

• Attacks:
  • Arcane Explosion
  
  

Spectral Deathknight

• Attacks:
  • Cleave
  
  

Spectral Rider

• Attacks:
  • Heal
  
  

Spectral Horse

• Attacks:
  • Stomp
  
  

Strategy:
The first phase of the fight is similar to the Nefarian encounter phase 1. It will spawn alot of mobs at three diffrent positions (the door like things), and for every mob you kill there will spawn a spirits behind the closed gates. After a while of fighting the spawning mobs the gates will open and the spirits will come out and start to attack. This phase is 4min 30sec long, and then Gothik the Harvester will come down and fight.
The three kinds of mobs that spawn is: Unrelenting Trainee, Unrelenting Rider and Unrelenting Deathknight, and every mob killed will transform to a corresponding Spectral: Spectral Trainee, Spectral Rider, Spectral Horse and Spectral Deathknight in the inner room. At some point (possibly determined by the number of Spectrals at that moment), the door between will open and the Spectrals will attack, so you need divide your raid and kill Spectrals along with their spawning.
Second phase unknown