This is the trash you will find in the center crossroads of Atal'Dazar.

Toxic Saurid melee attacks will add Poisoned Claws. You will also need to spread out as their Leaping Thrash hits pretty hard. Locking them down is a good solution.

The Feasting Skyscreamer are not so dangerous, except that their Terrifying Screech absolutely needs to be interrupted/stopped.

With the changes to count in this dungeon, you might end up pulling the middle pack, expect lots of random damage from Deadeye Aim and a bad frontal with Frenzied Charge. From a healer perspective, you should be ready for the AOE from Wild Thrash. It has been recently modified and has now no limit in range, so it is unavoidable AOE.

This is a pure mechanical fight. As a healer, there is not so much you can do here, outside of making sure you are executing things perfectly.

The only real damage here is on the tank, be ready to help them if needed (they might really need the help) and that's about it.

Remember this nice Shadowmeld trick explained here by Quazii:

This is the trash you will meet if you go to your left at the start to reach Priestess Alun'za

There are some nuances between the Plaza in front of the boss and the rest of the left side zone.

In general, there are plenty of casters with nothing but important spells to stop or interrupt. In higher keys, this will become the way as most of the damage is avoidable, compared to the right side, but it takes much more coordination.

Dazar'ai Augur will spam Wildfire, get as many interrupted/stopped as you can, simply ensure you have one interrupt for Fiery Enchant where they make the Dazar'ai Juggernaut burst in flames. The Juggernauts themselves have a leap Merciless Assault and a soothable enrage Fanatic's Rage. Be ready to quickly side-step Merciless Assault if you are ranged. The easiest is to watch its timer with a spell cooldown WA.

The Gilded Priestess will cast Transfusion. You should soak a Tainted Blood pool if you are targeted, so that she takes damage instead of healing

The Left side corridor includes mostly the same mobs, except the priestess. The one new mob is the Dazar'ai Confessor, a really annoying mob. Help your tank move the mobs when their Bwonsamdi's mantle is coming up.

A dodge bullet fight where you get a little help from Blizzard. Getting hit by an orb reduces the damage done by the player, so I'm willing to bet DPS will not soak those to finish a cast ;)

Other than that, you should always keep an eye on the Spirit of Gold and help control/kill them

The boss will cast Transfusion every 30-35 seconds, and you should have CDs ready for this. It is important that Gilded Claws is purged as soon as possible, same to dispel Molten Gold.

The first danger here is the Shadowblade Stalker, stealthed, who buffs their melee attacks with Venom-Tipped Blade and have a tank buster with Venomfang Strike. They will also cast Fan of Knives, dealing some AOE damage.

The Zanchuli Witch-Doctor spam Venom Blast and have an important interrupt Unstable Hex. If it does go off, be careful if you dispel it as it will spread to close people (there will be a circle to indicate that).

The Shieldbearer of Zul will create a Barrier that enemies should be pulled out from (  Bulwark of Juju).

The true problem here, the Reanimated Honor Guard are coupled with a Reanimation Totem. They can't be hurt until the totem dies, but then they will start spewing  Rotting Decay which is a lot of AOE damage, as well as hit the tank with Rending Maul.

Be prepared for this, it hurts, and their Grotesque Pool will make it hard to get your casts out at times. This mob certainly makes the right path ridiculously hard to heal at very high key levels.

A fight over which you have little control. Try to help with your interrupt and your damage to even out the totems

The main source of damage on the group will be Noxious Stench through the fights, be ready to react if the channel is not instantly interrupted and the stacks of Lingering Nausea are piling.

The first phase is definitely the biggest challenge. There are two main aspects to it. The first is the range which can be tricky to handle, with the DPS trying to even damage on the totems, that may naturally spread them around. The second is to be able to interrupt Noxious Stench channel (Boss will use it every 20sec-ish) as fast as possible. Each tick of the channel will add a stack of Lingering Nausea, which means more DOT damage on the team. The main issue to kick it fast is that the boss jumps around constantly with Toxic Leap. It is very hard to predict when a channel will become problematic, so the easiest strategy is to be ready for burst damage every 20 seconds, you will not need anything in P2

Not much to say healing wise during this phase, technically speaking, Noxious Stench is still there, but you will always interrupt it really fast.

After the hotfixes of Nov 21st, Yazma will become a much harder boss, with some high spot damage requirements.

At 100 energy (every 40 seconds), Yazma will cast Soulrend, which is both a mechanic and a damage event. This is the main damage event of the fight. If one of the adds reaches Yazma, you are in for a Soulfeast. Other than that, there will be spot healing here and there from the spiders hitting people (Echoes of Shadra) and the tank Buster (Skewer) but it should be nothing out of control.

Now that Wracking Pain cannot be interrupted or dispelled, you will need to do some intense ST healing. Do not hesitate to use an external if you are behind or the target does not have any defensive!