There's no real purpose to this diagram since the fight isn't explained very well visually, but Apoc wanted more diagrams so here ya go. Purple is ranged, Blue is melee, Green is tanks. This can serve as our placeholder strategy post!
BOSS ABILITIES
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Call of the Pack - Summons adds that always come out the same doorway
- Melee - AOE down the adds.
- Ranged & Healers - AOE down the adds.
- Tanks - Grab the adds.
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Pin Down - Targets a random ranged player and throws a spear at them. There is a small circle indicator before the spear hits. Any players caught in the circle indicator will be pinned down until the spear is killed. Spears that do not pin any players down still stay in the room and can be killed also.
- Ranged & Healers - Spread out and haul ass out of circles that appear under you indicating the spear is coming. If you are pinned, tell the raid to dps your spear down. Also, throughout the fight DoT up and aoe down the other spears around the room
CRUELFANG ABILITIES
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Rend and Tear / Rend & Tear (BOSS) - Jumps to a random ranged target, leaving a bleed on everyone within 7 yards of his target, then jumps back to the tank leaving the same bleed on everyone within 7 yards of the tank.
- Melee & Off tank - Move away from the main tank as soon as you see the the jump occuring.
- Ranged & Healers - Try to stay spread 7 yards apart at all times.
- Tanks - Swap on 2-3 stacks of Rend and Tear
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Savage Howl - Buffs nearby pack beasts with a 75% increased attack speed and deals damage to players around him.
- Druids & Hunters - Dispel this off the boss immediately with Soothe or Tranquilizing Shot.
IRONCRUSHER ABILITIES
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Tantrum / Tantrum (BOSS) - Raidwide aoe damage lasting 5 seconds
- Healers - Use a cooldown rotation for each tantrum
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Stampede - Charges a random player and knocks back melee and everyone within 15 yards of his target, dealing damage as well.
- EVERYONE - Just stay spread out.
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Crush Armor - Reduces the tank's amor by 15% per stack.
- Tanks - Swap on 2 stacks of Crush Armor
DREADWING ABILITIES
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Inferno Breath / Superheated Shrapnel (BOSS) - Turns around randomly and starts spewing a cone of fire in the direction he faces leaving a dot on players hit, stacking the longer players remain in the fire. Also leaves fire patches on the ground
- EVERYONE - Get out of the direction he faces for the breath ASAP! Don't stand in fire patches.
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Conflagration - Targets two players who lost control of their character and start spewing damage on people within 8 yards of them
- EVERYONE - Just stay spread out. Move away from players affected by Conflagration.
- Healers - Dispell conflagration ASAP.
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Seared Flesh - Fire damage the tank takes is increased by 20% per stack.
- Tanks - Swap on 5-10 stacks of Seared Flesh
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Flame Infusion (BOSS) - Packs Beasts corpses now light on fire when they die, dealing damage if you're standing in it.
- Melee - Move out of fire-lit corpses.
- Seeking Embers (BOSS) - Spears strewn around the room now deal periodic damage to players randomly.
IMPORTANT NOTES
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Darmac will choose a Beast to mount at 85%, 65%, and 45% health, always the one nearest him at the time.
- Tanks - Make sure when he gets close to each health interval he is dragged to the appropriate beast.
- Darmac retains abilities detailed in the list up above marked (BOSS) after we defeat one of his Beast mounts.
- When Darmac mounts a Beast, he WILL NOT cast the abilities of any other beasts that he has already acquired thus far as long as he is mounted
- Use Heroism/Bloodlust after defeating the third beast to burn him down quickly.

Fun fact: If you have bad timing/RNG, Conflag can happen right before Pin Down. I.E. you get conflag and run in a tiny circle on fire only to have a spear impale you since you aren't able to move.
The strategy I've seen most often has been Cruelfang -> Dreadwing -> Ironcrusher, but it can vary from group to group. If the fire from Dread is a big issues but the AoE dmg form Tantrum isn't an issue, you can save him for last instead for example