The Incredible Hulk
Force Svala Sorrowgrave to kill a Scourge Hulk on Heroic difficulty.
Hulk no smash today.
I haven't seen Svala trap a Scourge Hulk yet, but this achievement is still possible without it.
Pull a Scourge Hulk at the start of the fight and take it down to 15,000 HP. When Svala casts Ritual of the Sword, free your comrade and then place the Scourge Hulk under the sword. When the sword strikes, it should kill the Hulk. If not, there's a damage-over-time effect placed on anyone who is caught in the blast made after the sword connects. If the Hulk dies to that, it still counts towards the achievement.
You can help the damage along, but it has to be Svala's attack that deals the killing blow.
Lodi Dodi We Loves the Skadi
Kill Skadi the Ruthless within 3 minutes of starting the gauntlet event.
Like Hadronox Denied, you can cheat your way through this one. Engage Skadi at the start of the gauntlet, then retreat into Gortok Palehoof's room. After the mobs in the gauntlet despawn, run to the end before Skadi respawns. Once he has, send someone back to activate the gauntlet.
But this will still not be enough to beat Skadi in 3 minutes, mostly because the Harpooners take so long to spawn. Check My Girl Loves to Skadi All the Time for the rest and get both achievements done in one go.
My Girl Loves to Skadi All the Time
Defeat Skadi the Ruthless after having killed Grauf from 100% to dead in a single pass.
You'll need six harpoons split among three members of your team to pull this off. After gathering six harpoons, reset the encounter by running back to Gortok Palehoof's room. Once all the mobs are gone, run to the harpoon guns before Skadi respawns. Once Grauf is within range of the harpoons, let loose and hit him with all the harpoons you have before he passes.
Defeat King Ymiron on Heroic difficulty without anyone in the party triggering Bane.
Treat the fight as a DPS race. From the start of the fight, you have 20 seconds to damage Ymiron for 20% of his health. Bane is activated 20 seconds after Ymiron is engaged and after he loses 20% of his health. The timer for Bane is reset after he has been damaged by 20%, indicated by the party-wide stun he inflicts while running to the boats.
If your latency can handle it and your DPS can't, Bane can be dispelled or stolen. But good luck with that. Unless your realm is fresh and without transfers, you'd be hard pressed to find a party with DPS using rusty swords, a tank made out of paper, and a healer who's always OOM.
Experienced Drake Rider
On three different visits, get credit for defeating Ley-Guardian Eregos while riding an Amber, Emerald, and Ruby Drake on Heroic difficulty.
One: Do not allow your drake to die. If you can accomplish that three times with different drakes on each run, then you're set.
Make It Count
Defeat Ley-Guardian Eregos within 20 minutes of Drakos the Interrogator's death.
First off, go to your achievement menu and track this achievement.
This goes up there with Less-rabi in terms of difficulty. You're not bound by the power of your character's abilities, but the drakes instead. The good news is that the drakes scale with your equipment, so anyone who's raided the Argent Coliseum can rejoice. Everything will be peachy as long as you don't wipe.
After killing Drakos, take your drakes. A common composition of one Ruby, two Emerald, two Amber should work. Every 12 seconds, someone has to cast Stop Time to prevent aggro from the blue drakes surrounding the Oculus.
Fly to the central ring and destroy the constructs.
Once you've destroyed the last construct on the ring, mount up and fly through the rings towards one of the platforms with constructs on it. You should only need to kill 2-3 drakes to make a safe landing on the platform.
Tank the construct close to the edge where you landed, then mount up, hit Time Stop, then make your way to the next platform. Fly through the Oculus' rings to spare yourself the nerd rage from pulling drakes.
With the constructs down, fly through the ring to reach Varos Cloudstrider. Once he dies, that's the end of the drakes.
Fly up to Mage-Lord Urom and defeat him. Now you have only the whelps to worry about. Fly away from the ring and perch on one of the platforms surrounding the ring at the top.
If you've got five or more minutes left, then you should be safe. Fight Eregos, stay away from his large blue arcane balls, top up the drakes and win. If your drake falls, land on the ring and fight Eregos with bullets, arrows, axes, daggers, stones, and insults.
Defeat Ley-Guardian Eregos without anyone in your party using an Amber Drake.
Your damage will be weaksauce without the Ambers and this fight will take an eternity. Keep four Emeralds and a Ruby with you, make good use of Touch of the Nightmare and keep your drain attacks refreshed and maxed out.
Defeat Ley-Guardian Eregos without anyone in your party using a Ruby Drake.
Ruby Drakes aren't the only ones with the AoE attack to kill the whelplings, but the only ones that can mitigate damage from Eregos.
Have three Emeralds and two Ambers out if you only want this achievement. Personally, I'd rather go with a completely Amber party.
Defeat Ley-Guardian Eregos without anyone in your party using an Emerald Drake.
There's no one to heal you, but as long as your one or two Ruby drakes can handle the damage, the Ambers can cast Stop Time when Eregos enrages and have a spare Stop Time to take care of anything else.
Ruby and Emerald Void
Better to just get Amber Void and then get these two at the same time to be done with it. Order your party's Stop Time casts. Each has a one minute cooldown and the effects last for ten seconds, so give it at least twelve seconds from the previous cast. You'll take a little damage, but it's nothing that can't be shrugged off. Use the time to kill some of the whelps that show up. Their power is in their numbers and you don't want to be there when the sky is full of screeching baby dragons.
As for Temporal Rift, it's only useful if another party member is damaging Eregos during the channeling. You don't have to order it like Stop Time but someone does need to take shots at Eregos to build up those charges.