Medivh

This boss is like a 10/10 in difficulty, but you get to minus one for every good interrupt you brought

Dungeon Journal+

Inferno Bolt   Single Target   Fire   Debuff (DoT)   ✔Interruptable   ✔Dodgeable (difficult)

Frostbite  Single Target   Frost   Debuff (Stun)   ✔Interruptable

Piercing Missiles   Single Target   Arcane   ✔Interruptable

Ultimate Abilities

Flame Wreath   Two Targets   Fire   Debuff (DoT)

Ceaseless Winter   AoE   Frost   

Guardian’s Image   Summon Effect

Shimmer (Guardian’s Image)   AoE   Arcane   ✔Avoidance

Arcane Bolt (Guardian’s Image)   Single Target   Arcane   ✔Interruptable

You should know

• Every time Medivh hits full mana he’ll cast one of his ‘ultimate’ abilities at random. The ability chosen has nothing to do with which spells you interrupt and you will get all three before he repeats any.
• Flame Wreath will explode if the afflicted moves, if anyone else moves into the circle, or if they die. You can still jump (useful information).
• Piercing Missiles is priority interrupt, followed by Frostbite. Inferno bolt is only dangerous if it targets the same player twice in a row (since the DoT stacks) but you can otherwise let him cast.
• During Ceaseless Winter, continue moving to avoid taking any damage. If you’re in a frost block then you won’t take damage (don’t make a strategy out of this though!)
• The healing requirement for this fight is very very high, even when played correctly. Help your healer by making full use of your defensive cooldowns – especially if you are targeted by Flame Wreath.
• During the Guardian’s Image spell, DoT up all three birds (are they birds?) then focus them down one at a time as a party. Make sure you’re all attacking the same target.

Advanced

• You can dodge Inferno Bolt with blinks / displacement effects by waiting until the fireball has left his hand and then using your mobility cooldown. This works because Inferno Bolt targets the ground where you were standing rather than the player.

Mana Devourer

This boss is like a 10/10 in difficulty, but you get to minus one for immunity you brought

Dungeon Journal+

Arcane Bomb   Ground   Arcane   ✔Dodgeable

Unstable Mana   Ground   Arcane   Debuff (DoT, removed by standing in Energy Void)   

Energy Void   Ground   Shadow

Energy Discharge   AoE   Arcane   ✔Avoidance

You should know

• Unstable Mana ticks every 3 seconds, however Energy Void removes a stack of Unstable Mana every 1 second. Therefore if you pick up an orb close to a void you can drop it off without ever taking damage from it. Unfortunately the Energy Void itself still deals crushing damage so you’ll want to be careful how many orbs you pick up.
• Have your immunity classes pick up as many orbs as possible and then blow their immunity (the order you do this in does depend on the particular immunity). With everyone else picking up an orb each the immuner basically takes care of the entire wave themselves. Battle resses can be used in a similar way with an ally making a brave sacrifice while grabbing as many orbs as possible and then getting battle ressed. Even if you can’t res them, sacrificing someone may still be worth it if the boss is lower than 15% or so.
• On high keys you just can’t expect each person to grab more than 1-2 orbs each per wave without dying to the combination of Unstable Mana DoT, Energy Void and Energy Discharge which will buy you about 4-5 waves of orbs total.
• This is a fantastic boss to use Heroism / Bloodlust on if you’re light on immunities.

Viz’aduum the Watcher

I write this in memory of my friend who spent 4 hours on this boss

Dungeon Journal+

Burning Blast   Single Target   Fire   Debuff (Magic, DoT)   ✔Dispellable   ✔Interruptable

Disintegrate   AoE   Fire   ✔Dodgeable

Chaotic Shadows   Multi Target   Shadow   Debuff (Magic, DoT)   ✔Dispellable

Fel Beam   AoE   Fire   ✔Dodgeable

Soul Harvest   Ground   Fire   ✔Dodgeable

Stabilize Rift   Summon   ✔Interruptable

Blazing Hamstring (Felguard Sentry)   Single Target   Fire   Debuff (Magic, DoT, Slow)   ✔Dispellable

You should know

• Burning Blast should be interrupted or dispelled. It’s the only thing to interrupt for most of the fight and your healers dispels need to be saved for Chaotic Shadows.
• In phase 3 Stabilize Rift is a 30 second cast and there is no advantage to interrupting it early. Take care of the Felguard Sentry packs and move slowly down the ship if necessary. You (hopefully) don’t need to rush this phase. Sentrys can be stunned, slowed and knocked back to ease the pressure on your tank.
• Save heroism / bloodlust for phase 3.
• The number of Chaotic Shadows debuffs that go out increases during each phase. The DoT portion of the debuff is dangerous and the healer can only dispel one person at a time so use your defensive cooldowns if you’re afflicted. All party members should be spread at all times so that a quick dispel doesn’t end with an orb exploding.

Advanced

• You can skip all phase 2 mechanics by standing outside the bosses circle and dodging his Disintegrate beams. Melee DPS will have nothing to do but it does make the fight much safer and since there’s nothing to avoid your ranged DPS will deal much more damage. The boss will target the beams on the tank and so they should stand away from the DPS. This picture better demonstrates: