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.