Beastlord Darmac is the 1st encounter in the Iron Assembly wing in BRF.

This is a multiphase fight, similar to Iron Qon in ToT in that he rides mounts with their own abilities, except he retains a buff and an ability from each mount he rides.  Unlike Iron Qon, YOU determine what order he rides the mounts.

For a more detailed view of his abilities or loot, please view the in-game dungeon journal or click HERE to view at WoWHEAD.

Abilities/Overview

This fight starts out with just Beastlord Darmac.  He only has 2 abilities to start out, then as the fight progresses, he will mount on a beast in the room where you will have to deal with the beasts mechanics.  Once you kill the beast he is riding, he will gain a buff and an ability specific to that mount for the remainder of the fight.  So once all 3 (4 in mythic) mounts are dead, he will have a lot of crap to deal with.

Beastlord Darmac

1. Pin Down - Hurls a spear at a random player, dealing mild phys dmg to anyone within 25 yards of the impact.  Enemies within 3 yards of the impact take more damage and are pinned to the ground. These spears can be DPS'd down and later in the fight, it will be necessary to do so
2. Call of the Pack - Summons several Pack Beasts from one specific "cage/door" in the room periodically.  Just need to be tanked and cleaved down.
3. Beast Buffs/Abilities - granted to Beastlord Darmac AFTER you kill the specific mount he is riding.
   1. Cruelfang's Swiftness (buff)- This buff is gained after you kill Cruelfang (wolf) mount.  This increases his attack speed and the attack speed of any Pack Beasts within 30 yards by 35%.  Allows him to use Rend and Tear.
      1. Rend and Tear - Leaps to a target, causing anyone within 7 yards to get a mild phys dmg bleed.  Also increases dmg taken from future Rend and Tear by 10% for 30 sec.  Will also leap back to the tank and apply on them as well.
   2. Spirit of the Rylak (buff) - Pin Down and Pack Beasts become imbued with fire.
      1. Superheated Shrapnel - Deals moderate fire dmg on application and pulses mild fire dmg every 3 sec to anyone in the blast.  Can be dispelled/cleansed.
      2. Flame Infusion - When Pack Beasts die, their bodies become a patch a fire, deals mild fire dmg every sec you stand in it.
      3. Seekeing Embers - Pin Down spears are on fire, throwing fire at random players dealing mild fire dmg. MUST be DPS'd down to prevent extra fire dmg going out.
   3. Fury of the Elekk (buff) - Increases phys dmg done by 25%
      1. Tantrum - deals mild nature dmg every sec for 5 sec.  Think Epicenter from Feng in MSV.

Flamebender Ka'graz is the second encounter in The Black Forge wing in BRF.

For a more detailed view of his abilities or loot, please view the in-game dungeon journal or click HERE to view at WoWHEAD.

This fight is a single phase encounter that repeats once the boss has reached 100 energy, etc.

Primary focus for this fight is just staying out of Fire (go figure), dodging mechanics and killing Wolf adds simultaneously.  Overall the fight is somewhat easy to 'navigate' in terms of mechanics and what to do, but it is said to be very unforgiving if you continuously let yourself fail to them.

Fight Overview/Abilities

Flamebender Ka'graz starts out with an add called Aknor Steelbringer by her side.  He has very little health and only has 2 abilities to start.  Devestating Slam is just a frontal conal style mechanic that deals heavy phys dmg to ppl 15 yards in front of him.  Tank face him away from raid.  He also has Drop the Hammer where he just heroic leaps out to a random target, deals moderate phys dmg to anyone within 10 yards of the impact and knocking them back.  He is seen as more of a nuisance than anything.  Just nuke down at the start unless going for the achievement to get him as a follower.

Flamebender Ka'graz only has 2 abilities to Start.

1. Lava Slash - deals mild/moderate dmg to all targets within 7 yards of the impact spot and leaves behind fire.  This is essentially (as per Fatboss) chain lightning that leaves fire on the ground. Also, anyone within 6 yards of the targeted player will spawn an additional fire line towards them. You can see this in the Fatboss vid linked below.  Stay spread ~7-8 yards for the fight until you need to stack for her 25 energy and 100 energy mechanics.
2. Summon Enchanted Armaments - She will spawn weapons randomly around the room that do a 6 yard AoE dmg every 3 sconds until they despawn.

Start off, kill Aknor, range spread out to avoid stacking the Drop the Hammer damage.  Unless you want the follower, in that case, 3rd tank, away from raid.

With Ka'graz, first thing will be fire lines (Lava Slash), they'll hit their target and explode, but if it damages other targets, they get additional fire lines. 

Then summons spinning weapons, it's just a void zone to stay away from the entire fight.

At 30 energy, there's a meteor type ability (Molten Torrent), run into melee to split the damage.

At 50 energy, 2 wolves spawn, one will be tankable, one will fixate on someone, they alternate too.   They also have a beam between them, anyone crossing it gets a DoT.   Both wolves also must die within 8 seconds of each other.   And both wolves must die before Ka'graz reaches 100 energy.

At 75 energy, random ranged will get damaging debuff to all within 12 yards (Blazing Radiance), so stay away from people.

At 100 energy, Ka'graz and the wolves will channel aoe damage Firestorm, afterwards, lobs lava at the range.

The Blast Furnace is the final boss encounter in the Slag Works in BRF.

This is a 3 phase encounter.  The first 2 phases are primarily dealing with adds, and the last phase you deal with the "boss" itself.

I will go over each Phase briefly as there are a ton of adds and will NOT delve deeply into each of them.

One ability to note that lasts through the entirety of the fight is Blast.  The furnace will periodically burst mild/moderate raid-wide fire damage.  This damage increases via the Heat meter.  The higer level of the Heat the higer the damage of Blast.  After you reach Phase 2, the Heat meter will stop growing, and will slowly decrease, which will cause the damge from the pulses to gradually decrease. 

Phase 1 - Sabotage

There are Heat Regulators on each side of the Furnace, you must disable these to move to the next phase.

There is a mini-boss this phase called Foreman Feldspar that needs to be nuked down immediately at the start of the phase.  He deals aoe fire dmg to the raid and spawns fire shit under randon players.  Interrupt his Pyroclasm ability to negate extra fire damage being thrown at random players.

There are 3 other adds this phase that you will deal with primarily.

Bellows Operator - these just periodically increase the heat meter of the Furnace.

Security Guard - These need to be tanked, and randomly pop up Defense shields that makes any mob within the shield immune to damage.  When they pop this up, just move any other mobs outside the shield.

Furnace Engineer - These are the primary kill targets.  They throw out Electrocution which is a "chain lightning" ability that spreads up to 2 targets within 5 yards of the initial target, so stay loosely spread.  They will also try to Repair the damage youve dealt to the furnace, this is INTERRUPTABLE!  They will also throw Bombs on random players.  Players affected with this will blow up after 15 seconds and deal dmg to anyone around them.  Players affected with this need to run to the furnace doors and explode on them to deal damage to the Furnace.  Once this add dies, he will drop a sack of bombs that will explode after a set amount of time.  Players need to CLICK on the sack, it will give them the Bomb debuff, same as the ability above, run to the Furnace door and blow it up.

Phase 2 - The Heart Exposed (occurs after Furnace Doors are destroyed)

The boss leaves the Furnace, the Heat meter will start to gradually go down.  More adds spawn.

Security Guard - same as above

Primal Elementalist - 4 of these adds will channel an ability on the boss, freezing him in place and making him immune.  However, they ALSO have an immunity shield and will take no damage.  In order to break their shield, you need to kill another add, the Slag Elemental, on top of them.  This will remove their shield so they can be damaged for a limited amount of time.  NUKE the Elementalist before the shield pops back up on them.  DO NOT USE HERO on them.

Slag Elemental - They will Fixate on a random player and will remain fixated on them until either the player is dead or it dies.  Once it dies, it will explode for ~100k fire damge to all enemies within 8 yards and go Dormant.  It will regain 20 energy for each Blast the furnace pulses out.  Once it reaches 100 energy it will re-activate.  Kill this mob on the Primal Elementalist to break their shields.  They also cast Burn which deals mild damage to current target.  Its a long cast and fairly negligible, but interrupt none-the-less.

Firecaller - These adds are a HIGH priority.  Interrupd=t their Cauterize Wounds ability, as this will heal the target for 10% of its max health.  Very bad if it goes on an Elementalist or the Slag Elemental.  Lava Burst - deals ~55k fire damage to a random target and is fairly negligible.  Better to interrupt CW compared to this.  Main reason to nuke this mob down is Erupt, where it will spawn lava to spawn underneath a dormant Slag Elemental and re-activate it immediately.  You want to avoid having multiple Slag Elementals up at the same time.  Also puts out Volatile Fire debuff, this explodes after 12 seconds dealing ~75k fire dmg to players within 8 yards.  If you get the debuff, run out.

Phase 3 - Freedom (occurs once all 4 Primal Elementalists are killed)

At this part of the fight, all that is left is the boss, and any adds that might still be alive.

The boss has 3 primary mechanics in addition to the Blast damage coming from the furnace.  2 of which are tank based, and the 3rd is just a large slag of lava on the floor.

Heat - Stacking ability that leaves a Fire DoT on the tank.  The damage that Heat deals increases by the number of stacks of Tempered the tank has.

Tempered - to break it down simply, an additional stacking debuff that increases the damage that you can take from heat.  This stack can NEVER be higher than the number of stacks of Heat the tank has.  Taunt off on low stacks of Heat to prevent this from getting too high/crazy of damage.

Melt - Heats the floor under random players turning it into a LARGE zone of lava, dealing dmg every sec. DON'T STAND IN FIRE!.  The room will gradually fill up with these, leading to soft-enrage.

TLDR/Saedo's Cliffs Notes

First phase, adds.  Tank adds, kill adds, don't stand in front of adds, don't stand in fire of adds, grab bomb or get debuffed as a bomb (via Engineers), become the bomb, run to a Heat Regulator (2 of them 1 on each side), blow up the Heat Regulator.   Interrupt adds that try to repair/heal the Heat Regulators.  Divide raid in 2 to be responsible for each one.

Second phase, 4 primal elementists must be killed but they have a shield.  Shields brought down by Slag Elemental dying and exploding near them, they random fixate on players, must kite and kill near Primal Elementists, then blow it up (melee don't be near that).   Also, raid aoe damage and other adds to deal with.  Firecallsers sends out random debuff makes you explode, so run away if you have it, interrupt healers.   Security Guards can protect their allies, so kill them, also apparently MC'able and can kill/debuff elementals if need be.

Third phase, kill the Heart of the Mountain, some massive raid wide aoe going on here.  Tank swap mechanic too.  Fire patches on the ground to not be in.   Pop Hero and go.

Gruul is the first boss encounter in the Slag Works (1st wing) of BRF.

This fight is very similar to the BC encounter vice a few new abilities.  Its not a 'phase' fight per se, but it does go back and forth between 2 'phases' until dead.

For a more detailed view of his abilities or loot, please view the in-game dungeon journal or click HERE to view at WoWHEAD.

Abilities

Inferno Slice - Frontal slash attack that deals heavy damage on the current tank.  Stacking debuff that increases damage taken.  Also applies MASSIVE fire dmg split amongst players hit, giving a debuff that increases dmg taken from IS by 20% per stack and also leaves a light/moderate fire DoT on all hit.  Tanks need to stack with set group of players to split the fire damage.

Cave In - Ceiling collapses over players.  Deals light/moderate phys dmg every sec you stand in it.  Noted by circles of crumbling ceiling.. should be no more than 3 up at any given time.

Overwhelming Blows - Heavy phys dmg to enemies within 10 yards.  Stacks, increasing dmg taken from OB by 10% per stack.

Petrifying Slam - Same thing as BC encounter.  Knocks players in random direction, and starts petrifying players.  Once players receive 6(as per BETA) stacks of petrification they Shatter - dealing mild/moderate nature dmg to anyone with 8 yards.

Overhead Smash - Slams ground in a random direction, dealing heavy nature dmg.  Noted by line of crumbling ground when casting.

Destructive Rampage - Becomes blinded by rage, increasing haste by 50% and repeatedly slams the ground.  During this phase he will ignore all threat targets and face random directions and spam-cast Overhead Smash.

Note that the abilities listed here are from the LIVE Dungeon Journal.  If you watched the FATBOSS BETA vid, the fight has changed fairly drastically.  Cave In occurrs throughout the fight, there should be no more than 3 cavei-ins occuring at any given time, and the 2nd "phase" does not have large cave-ins to dodge any longer.  He simply deals heavy AoE dmg to the raid and spams Overhead Smash in random directions.

"Phase 1" - lasts approx 1 min 50 seconds

Tank Gruul in the middle-ish of the room, facing away from the raid.  Ideally the Off-tank should be directly behind the boss, and have the raid split into 2 groups, one on each side/foot of Gruul.  Main Tank will deal with Gruul for 60 seconds(ish) to deal with the tank debuffs, and pay attention to Gruuls Rage Bar and/or DBM timers.  When he nears 100 energy he will use Inferno Slice, the MT needs to run to 1 of the 2 stacked grounds to split the fire damage.  Alternate groups when doing this so one ranged group doesnt take 2 in a row.  This MIGHT be different than BETA, so you MIGHT have to have one group take 2 of the IS in a row, depending on the duration of the 20% debuff.  Pay attention to when he casts Overhead Smash and spread for it, then quickly regroup.  When he does Petrifying Slam, do your best to spread at least 8 yards so you dont Shatter on someone else.  STAY OUT OF FIRE (aka Cave In).

"Phase 2" - lasts approx 30 seconds

Gruul will move to the center of the room and go into Destructive Rampage, and spam Overhead Smash so be sure to move/spread when appropriate.

TLDR/Saedo's Cliffs Notes

Short version, 2 stacked groups, boss does Inferno Slice, fire damage that splits amog all it hits.  But also, Overwhelming Blows, a smash the tank and all around him damage attack.  All on the tanks to only move into a group during Inferno Slice, and away from a group during Overwhelming Blows.

Next up, Petrifying Slam, just like back in Burning Crusade, get knocked back, spread out and don't kill other people.

Then there's a phase where he just cause cave ins and raid wide damage.  And it repeats back and forth between above abilities and this.