Dan Heng IL is an Imaginary Element Character that follows the Path of Destruction. He is a DPS character that excels greatly with his Enhanced Basic ATK by consuming multiple Skill Points. In his enhanced Basic ATK, Imbibitor Lunae receives numerous buffs to make his Basic ATK more powerful.
To relieve his SP hungry mechanic, Imbibitor Lunae has a gimmick called Squama Sacrosancta, a stacking system that he can use that is equivalent with Skill Point. Squama Sacrosancta has 3 max stacks and will be the first to be consumed before the Skill Points. He can gain stacks of Squama Sacrosancta through his ULT and Technique.
Best Cavern Relics
(2) Increases Imaginary DMG by 10%.
(4) When attacking debuffed enemies, the wearer's CRIT Rate increases by 10%, and their CRIT DMG increases by 20% against Imprisoned enemies.
This set is his best so far, Imbibitor Lunae will enjoy dishing out extremely powerful DMG with this Relic as it grants extra Imaginary DMG boost. He can also gain extra Crit Rate with debuffed enemies and Crit DMG if they are imprisoned.
Best Planar Ornaments
(2) Increases the wearer's CRIT Rate by 8%. When the wearer's current CRIT Rate reaches 70% or higher, the wearer's Basic ATK and Skill DMG increase by 20%.
This Planar Ornament is ideal with Imbibitor Lunae's playstyle as it boost his Crit Rate and also his Enhanced basic ATK.
Best Stats

Body
CRIT DMG / CRIT Rate

Boots
SPD

Sphere
Imaginary DMG Boost

Rope
ATK%
Substats
CRIT Rate / CRIT DMG / ATK% / SPD
info
Imbibitor Lunae's ATK must be at least 2500 and Crit Ratio of 60/170. However, his SP unfriendliness makes him less appealling to have high SPD though a 135 SPD is better to make his turn faster.
Best Light Cones
SourceLight Cone Event Warp
Defiant Till Death
Increases the wearer's CRIT Rate by 18~30%. When the wearer uses their Basic ATK, they will gain 1 stack of Dragon's Call, lasting for 2 turns. Each Stack of Dragon's Call increases the wearer's ATK by 18~30% and Energy Regeneration Rate by 6.0~10.0%. Dragon's Call can be stacked up to 2 times.As this is Imbibitor Lunae's signature Lightcone, it helps him greatly with Crit Rate and ATK boosting. It also allows to achieve better ULT uptime as it provides ER.
Moth To Flames
When the wearer attacks, increases their ATK by 8~16% in this battle. This effect can stack up to 4 time(s). After the wearer breaks an enemy's Weakness, increases DMG dealt by 12~24%, lasting for 2 turn(s).This is basically a Lightcone that can be considered if his signature LC is not available. It initially enhance his ATK and provides a good amount of DMG boost whenever Imbibitor Lunae inflicts weakness break.
SourceStellar Warp, Departure Warp, Character Event Warp, Light Cone Event Warp
Rye Under the Sun
Increases the wearer's ATK by 16~32%. When the wearer defeats an enemy, the wearer's CRIT Rate increases by 12~24% for 3 turn(s).This literally increase Imbibitor Lunae's ATK and gives off Crit Rate when he defeats an enemy. It's kinda good with endgame contents that has multiple waves of enemies, especially the Pure Fiction.
SourceStellar Warp, Departure Warp, Character Event Warp, Light Cone Event Warp
Fantastic Adventure
When the wearer uses Basic ATK, Skill, or Ultimate to attack enemies, the wearer gains one stack of Mischievous. Each stack increases the wearer's ATK by 12~24%.This is a good Lightcone with boost effect Imbibitor Lunae can fully achieve. It merely requires him to use his Basic ATK, Skill, and ULT to maximize the stack in order to enhance his ATK. Using this will extremely boost Imbibitor Lunae's DMG.