Guide to Twin Val'kryrs

Abilities:

General:

• Dark Essence - Absorbs Dark damage, reduces damage done against Dark targets, and increases damage done against Light targets. Absorbing Dark damage can proc Surge of Speed. Gained by clicking a Dark Essence.
• Light Essence - Absorbs Light damage, reduces damage done against Light targets, and increases damage done against Dark targets. Absorbing Light damage can proc Surge of Speed. Gained by clicking a Light Essence.
• Surge of Speed - Increases movement speed by 70% for 15 seconds.
• Concentrated Light/Darkness - Floats around the room. When a player or NPC of the same Essence absorbs it, they gain Powering Up. When a player or NPC of the opposite essence absorbs it, they take damage.
• Powering Up - Causes Empowered Darkness or Empowered Light at 100 stacks.
  

  • Empowered Darkness - Increases damage done against Light targets by 100%. Restores 20% of the target's maximum mana. Lasts 20 seconds.
  • Empowered Light - Increases damage done against Dark targets by 100%. Restores 20% of the target's maximum mana. Lasts 15 seconds.
• Unleashed Dark - Inflicts 7,800 to 8,200 (
  
  25-Players: 8,775 to 9,225) Dark damage to enemies within 6 yards. Used whenever a Light player touches Concentrated Darkness.
• Unleashed Light - Inflicts 7,800 to 8,200 (
  
  25-Players: 8,775 to 9,225) Light damage to enemies within 6 yards. Used whenever a Dark player touches Concentrated Light
• Twin Spike - Inflicts 100% weapon damage and increases all damage taken by the target by 20%. Each hit depletes a charge from the damage debuff. Lasts for 15 seconds or 10 charges.
• Shield of Lights / Darkness - Absorbs 175,000 (
  
  25-Players: 700,000) damage and prevents spell interruption. Lasts 15 seconds. Cast immediately before Twin's Pact.
• Twin's Pact - Heals the Twin Val'kyr for 20% of their total health. Cast immediately after Shield of Lights / Darkness. The 15-second cast can be interrupted if the shield is down.
• Power of the Twins - Increases Physical damage done by 20%, hit chance by 20%, and attack speed by 10% for 15 seconds (Val'kyr Quickness). Used only if Fjola is less than 60 (?) yards from Eydis. Both Twins gain this buff.
• Val'kyr Quickness - The Power of the Twins increases attack speed by 10% for 15 sec. Stacks.

Fjolja Lightbane:

• • Light Essence - Fjolja Lightbane is a Light creature. She takes less damage from targets with Light Essence and more damage from targets with Dark Essence. Her Vortex does Light damage.
  • Light Vortex - Inflicts 5,850 to 6,150 (
    
    25-Players: 8,775 to 9,225) Light damage every 1 second for 5 seconds. Channeled after 8-seconds cast. Affects only targets with Dark Essence.
  • Surge of Darkness - Pulsing a Surge of Darkness Inflicting 2500 damage every 2 sec to Light enemies.
    

Edyis Darkbane:

• Dark Essence - Edyis Darkbane is a Dark creature. She takes less damage from targets with Dark Essence and more damage from targets with Light Essence. Her Vortex does Dark damage.
• Dark Vortex - Inflicts 5,850 to 6,150 (
  
  25-Players: 9,263 to 9,737) Light damage every 1 second for 5 seconds. Channeled after 8-seconds cast. Affects only targets with Light Essence.
• Surge of Light - Pulsing a Surge of Light Inflicting 2500 damage every 2 sec to Dark enemies.

The Fight:

Twin bosses, shared HP pool, opposite aspects, Light and Dark. When you talk to the NPC to get them out, they're be 4 portals that appear. Two on each side, 2 of each other. Looking in, closest left is Light, farthest left is Dark, also where the Dark Twin will be. Closest right is Dark, farthest right is Light, also where the Light Twin will be. Clicking on the portal will gain you their respective buff.

Split the raid in half. Each side basically taking the portal closest to them to attack the twin on their side. You must attack the Twin of the opposite color you gain. You'll not only do more damage to the Twin of the opposite color, each twin also pulses an aoe that hurts ones with the same color as themselves, while the same colors will just absorb the damage Though, I believe it's totall healable in the Normal versions.

Note: A tip for the warlocks before the fight starts, if you all click on the Light Portal and spam Hellfire, you would start gaining stacks. This way you can start ahead of the rest of the raid and get Empowered Darkness/Light much earlier. Just switch back to your assigned portal before you start, the stacks do carry over regardless of color.

Anyways, after you start, there are 3 things that can happen.

First, Twin Pact. One of them will cast a shield that absorbs damage, you must burn through it in 15 secs and interrupt the heal that comes after. In Normal, you probably have enough dps to just handle each side on their own. Be wary on Heroic this may not be the case and the guys on the other side must jump in to help, perhaps switching colors to boost dps. Switch back afterwards.

Second, Vortex. One of them will start to channel a vortex which will do massive aoe to everyone of the opposite color. So whichever twin that's channelling, the raid must switch to that color to negate all the damage. That is, if Dark Twin casts Vortex, everyone switch to Dark portals. If Light Twin casts Vortex, everyone switch to Light portals. Switch back to default colors afterwards.

Third, Concentrated Light/Darkness. Floating orbs will spawn out and randomly move all over the place, they'll be either light or dark ones. "Bullets" if you want to call them that. Your goal is to avoid the ones of your opposite color, they'll just explode on you and hurt you. And to absorb the bullets of the same color, Light on Light, Dark on Dark. When you do, your absorbed buff goes up.

That's another thing, you get a Powering Up debuff, and as you absorb more the stacks go up, to 100. Once there, you get a 15s 100% damage boost for moar dps.

That's about it, shared hp pool so split raid accordingly and burn them down.