Ghaz'an

Abilities

Acid Spit: Cone attack dealing 2000-2500 damage.

Acid Breath: Deals 155 nature damage every 3 seconds, stacks up to 4 times.

Tail Sweep: Knock back + 450-820 damage

Enrage: Enrages at 20% Life.

Fight

Have the tank stationed ahead of the party before engaging, this allows him time to turn the boss around allowing party members to avoid the acid spit/tail sweep attacks. It is vital to keep the boss facing away from the party unless you like the idea of getting hit for thousands of damage repeatedly.

Besides the positioning the only other problem is Acid Breath and the Enrage, just speed up healing to counter Acid Breath and you may need to spam it a bit when the boss enrages.

Hungerfen

Abilities

Spores: Roots hungerfen and releases a poison cloud attack dealing around 500 damage a second. All damage is retuned to hungerfen as Health multiplied by four.

Underbog Mushroom: Randomly spawned near the party these grow and eventually release a spore cloud that deals around 350-550 nature damage every two seconds. This stacks up to five times.

Fight

Have your tank pull the boss, hungerfen, to the center of the room. This gives you room to move around as the Mushrooms spawn, otherwise they can be quite deadly. Basically moving is the key to winning the fight, stay in the poison clouds and you lose.

Hungerfen will hit quite hard so be sure to remain aware on this fight, sleepy healers makes for a dead tank rather quickly. Once Hungerfen reaches 20% HP you're going to need all melee to move out, his life drain ability will heal him insanely fast.

Swamplord Musel'ek

Abilities

Raptor Strike: Adds around 500 damage to his attack.

Aimed Shot: Deals around 2K damage.

Multi-Shot: Hits multiple targets for around 2000-2500 damage.

Freezing Trap: Freezes party for 3 seconds.

Echoing Roar: Reduces armor by 75%.

Fight

Generally I like to take out Claw first, Heavy DPS on him while the tank holds the swamplords/claws aggro. This is however only effective if you can kill Claw without endangering your tank too much due to his armor reducing debuff roar.

Claw is a basic Tank n' Spank, once he's out of the fight you can turn to the swamplord, one thing about fighting him is to try and keep as many people out of his multi-shot attack as you can. Other then that the only annoyance is the freezing trap.

The Black Stalker:

Abilities

Levitate: Lifts a party member off the ground and moves them away from the Black Stalker.

Static Charge: Repeatedly deals 750 nature damage to self and party members nearby.

Chain Lightning: Hits nearby targets with lightning.

Fight

Essentially this is the hardest fight in the dungeon, you're going to need everyone to spred out immensely to avoid mass chain lightning damage and static charge slaughter.

Levitate can be quite the annoyance as well, healers may be strained on this fight what with the large number of healing targets as compared to other fights. So, basically you need everyone on the ball getting out of the party when they're afflicted with static charge otherwise you're going to run out of mana and die.