Diluc is something of a standout DPS character in Genshin Impact, but to get the most out of him, you'll need a solid build. Remember that all characters build a little differently and have different options available to them. Understand what makes a character so strong is how you'll get the most out of them, and all levels in the world won't make a difference if you have the wrong weapons and artifacts.
You also need to consider the effect on Constellations, additional bonuses you can unlock when pulling multiples of the same Wishes character.
Diluc has two great choices for weapons, the Wolf Tombstone, a 5 star Claymore, or the Debate Club, a 3 star weapon. Since you're more likely to draw the Debate Club, we'll cover that first.
The Debating Club, which can be obtained from chests, will give 60-120% increased damage in a small area of effect after using an elemental skill, normal or charged attack, making it fantastic for chopping at through the crowds. This additional damage can occur every three seconds.
The Wolf's Gravestone, obtained from Wishes, will increase your base ATK stat by 20-40%, depending on the level of the weapon. When hitting enemies with less than 30% health, you will buff all party members ATK by 40-80%, again depending on weapon level.
The Skyward Pride is another good Claymore you can get from Wishes that will work well on Diluc in a pinch. This will increase all damage by 8-16%. After using an elemental, normal, or charged attack, the sword will create a vacuum blade that deals 80-160% ATK damage along the blade's path and lasts for 20 seconds or 8 swings, whichever comes first.
For Artifacts, you should aim for the Crimson Flame Witch. This will increase Pyro damage and Overload and Burn damage. You can get these artifacts from Wishes, Chests, Quests, and Zhou Forumla's Hidden Palace on Wuwang Hill in Liyue.
- Witch's Fire Flower
- Eternal Witch Feather
- The Witch's End Time
- Witch's Heart Flames
- Burning witch hat