Halls of Infusion is an ancient dragon structure under Tyrhold created to feed the Life Pools of the red dragonflight by water. The dungeon is located in Thaldraszus at /way 59.24 60.64, but now it’s invaded by Primalist, facing which won’t be an easy walk.

Players with Engineering or Herbalism professions always will be welcomed to the Halls because of the helpful bonuses they can provide you. In Infuser’s Rotunda, engineers with at least 25 skill can find Limited Immortality Device to give all teammates Limited Immortality cheat death ability. Herbalists can find Infused Mushroom in the Intake Reservoirs (to the left after defeating the first boss) and in the Khajin’s Gambit (after the third boss) and get Cleansing Spores buff for 30 minutes.

Watcher Irideus	Avoid Spark Volley ground puddles Kick Nullification Device Purifying Blast casts During Phase 2 tank should stack Nullification Devices near the boss to destroy Ablative Barrier Also, the tank should frontal strike Titanic Fist away from teammates The healer should be patient with Power Overload, dispel debuff, or spot-heal teammates.
Gulping Goliath	First of all, watch Cave In void zones Blast down all Curious Swoglet adds until they stack too many Gulp Swog Toxin stacks on you (10 stacks will be lethal) When the boss casts Gulp, one player should be eaten to protect the group from Hangry Enrage Effect.
Khajin the Unyielding	The main part of the fight is Hailstorm cast. Players should use Ice Boulder or immune ability to survive. Note that you can use Ice Boulder only one time because it will explode after, so you should always check the platform to find a new one Be prepared for Glacial Surge rings diverging from the boss Avoid Frost Cyclone, and don’t let this spell destroy some Ice Boulder Healer should dispel Frost Shock effect as often as possible.
Primal Tsunami	Avoid Infused Globules spheres two-stepped damage Avoid Crashing Tsunami  at stage two Avoid one more ability, Rogue Waves Kick Primalist Infuser casts, first of all, Infuse The tank should be near the boss during all the fight to protect the group from AoE damage, and be prepared to use mitigations when Primal Tsunami uses Squall Buffet The healer should dispel Waterlogged slow effect.

Data based on guides from Overgear.com