Minecraft Dungeons

Make sure you have 3 gongs from the game and have each one in your item slots. Equip a piece of gear that has final shout and let yourself get hit and get to about 50% HP. Pop all 3 gongs WHILE you are being hit, that way all 3 gongs from X, Y, and B go off and then all 3 go off again from the final shout. Was able to do this in about 60 seconds after loading into a level.

Items needed:
3 gongs
Armor with Final Shout

EDIT: the new Pilgin armor also gives a cooldown to artifacts when a potion is used (appears several have had better chances with the new armor)

EDIT EDIT: appears the achievement can be gotten at the base camp as long as you have the proper gear, no world needed

Collect three Gong of Weakening Artifacts and a set of Piglin Armor (or the Golden Piglin Armor).

Once you have these four items, go to your camp and equip the three artifacts and the armor. Health usage resets your artifacts so all you have to do is press X, Y, B, LB, X, Y, B.

You can get Gongs of Weakening via the Desert Temple quest and the Piglin Armor from the Nether Wastes or Basalt Deltas.

Also the Village Merchant or the Luxury Merchant could be carrying either item in their inventory. Look after each mission and restock if they arent found the first attempt. It costs 100, 200, and 400 to restock the Village Merchant and 400 for the Luxury Merchant once. So for 1100 emeralds you can get 30 attempts (if at max slots) at getting these two items which is pretty reasonable.

You will need to unlock 3 Gong of Weakening artifacts from replaying levels from the main game. Next, you want to unlock some Piglin armor, which is new to this DLC. Piglin armor, unique or not, will have a passive ability of replenishing your artifact cooldowns when you use a potion. We can do this in a level or in our camp. Just trigger all 3 gongs, drink your potion, and trigger your gongs again as fast as you can.