Refinements:

R1: Falling Rainbow's Wish

ATK is increased by 28%. When you use a Plunging Attack, you will gain the "Dawn's First Hue" effect: Plunging Attack CRIT DMG is increased by 28%. When you use an Elemental Skill or Burst, you will gain the "Twilight's Splendor" effect: Plunging Attack CRIT DMG is increased by 40%. The two effects above each last for 15s, and will be canceled 0.1s after the ground impact hits a target.

R2: Falling Rainbow's Wish

ATK is increased by 35%. When you use a Plunging Attack, you will gain the "Dawn's First Hue" effect: Plunging Attack CRIT DMG is increased by 35%. When you use an Elemental Skill or Burst, you will gain the "Twilight's Splendor" effect: Plunging Attack CRIT DMG is increased by 50%. The two effects above each last for 15s, and will be canceled 0.1s after the ground impact hits a target.

R3: Falling Rainbow's Wish

ATK is increased by 42%. When you use a Plunging Attack, you will gain the "Dawn's First Hue" effect: Plunging Attack CRIT DMG is increased by 42%. When you use an Elemental Skill or Burst, you will gain the "Twilight's Splendor" effect: Plunging Attack CRIT DMG is increased by 60%. The two effects above each last for 15s, and will be canceled 0.1s after the ground impact hits a target.

R4: Falling Rainbow's Wish

ATK is increased by 49%. When you use a Plunging Attack, you will gain the "Dawn's First Hue" effect: Plunging Attack CRIT DMG is increased by 49%. When you use an Elemental Skill or Burst, you will gain the "Twilight's Splendor" effect: Plunging Attack CRIT DMG is increased by 70%. The two effects above each last for 15s, and will be canceled 0.1s after the ground impact hits a target.

R5: Falling Rainbow's Wish

ATK is increased by 56%. When you use a Plunging Attack, you will gain the "Dawn's First Hue" effect: Plunging Attack CRIT DMG is increased by 56%. When you use an Elemental Skill or Burst, you will gain the "Twilight's Splendor" effect: Plunging Attack CRIT DMG is increased by 80%. The two effects above each last for 15s, and will be canceled 0.1s after the ground impact hits a target.

Your support is more valuable than a primogem.