Full event explanation - Triple Trouble Wurm Amber
Escort:
First we have to escort an Asura from Firthside Vigil Waypoint to the arena.
On the way we have to kill some Eggs, Wurms and a Husk.
First phase:
When the Amber Wurm Head spawns, it will start with 20 stacks of Slick Skin. As long as Amber has at least one stack of Slick Skin, it will be immune to all incoming damage.
During the event, Amber tries to spit Great Jungle Wurm Eggs and Champion Partially Digested Husks. We always run with people that block the Wurm's attacks (called Diboof) and deal condition damage to deal with the Eggs and Husks. If the Wurm does a spin or spit, dodge out of the appearing orange fields. Also avoid to get hit by the Husks (Landing spots are marked with squad markers).
To remove the 20 stacks of Slick Skin we first have to kill the Plague Carrier Abomination that will be walking in half a circle across the area. It will explode and spawn a white aoe field that gives use the Wurm Attractant buff. Walk through the field to get the buff and stack in front of the Wurm Head at the red arrow marker. Drop reflect skills like Wall of Reflection or Feedback there to protect us from the veteran Wurms targeting us.
The Wurm will burrow and reappear, swallowing all players with the attractant. Inside of the Wurm's stomach, you have to pick up the Unfortunate Adventurer's harpoon behind you and shoot the Pyloric Valve in front. Make sure to keep an eye on your health during your visit in the stomach as you will take damage all the time. After the Pyloric Valve is defeated, make sure not to use your harpoon until you get spit out again (you have only one shot left).
After spat out use condi cleansers to remove the weakness debuff. Then run back to the Wurm Head and use your last harpoon shot on the commanders' countdown to remove the Slick Skin. Make sure you have the Wurm Head targeted and a clear line of fire. Since there are 20 stacks, we need at least 20 people to shoot their harpoons.
After all stacks of Slick Skin are removed, you can damage the wurm for 30 seconds. Make sure to stand in the middle of the Wurm to hit the double damage spot. Place down fire fields and blast them for might. Warriors place their Banners and Battle Standard outside the stack so nobody pick those up.
Elementalist use your Conjure Frost Bow (use skill 4 then skill 3 and drop it) and Conjure Lightning Hammer (skill 4 then keep using skill 1) inside the stack for other players to pick up.
After 30 seconds the Wurm will regain the 20 stacks of Slick Skin.
Before we repeat the process from killing the Plague Carrier Abomination, we have to clear the arena from Veteran Wurms since we still have a debuff on us that prevents the Wurm from swallowing us. Don't kill the Abomination too early.
We will repeat that process until we get the Wurm down to 10% HP. After that, we have to wait for the other two Wurms and organize the last burn phase.
Once a Wurm Head has been decapitated, it will burrow underground and the timer will be set to 1 minute. If the other two Great Jungle Wurms are not decapitated within this time, the event will fail. So we always have to make sure to kill all 3 heads at the same time.
Second phase:
When all Wurm Heads are decapitated, they will unburrow and you have 2 minutes to kill them. They will use 3 attacks you have to watch out.
1. It will charge to a random player and kill everything in its way. Make sure to always stack on the commander to hinder the Wurm charging too far away and dodge out of its way.
2. It will flop up and down causing knockback.
3. It will wiggle around. This attack is harmless and you can go on damaging.
After this is done, a portal will appear nearby which will bring players to Firthside Vigil Waypoint where players may claim their rewards.