Refinements:

R1: Solar Shine

Normal Attack hits increase Elemental Skill and Elemental Burst DMG by 20% for 6s. Likewise, Elemental Skill or Elemental Burst hits increase Normal Attack DMG by 20% for 6s.

R2: Solar Shine

Normal Attack hits increase Elemental Skill and Elemental Burst DMG by 25% for 6s. Likewise, Elemental Skill or Elemental Burst hits increase Normal Attack DMG by 25% for 6s.

R3: Solar Shine

Normal Attack hits increase Elemental Skill and Elemental Burst DMG by 30% for 6s. Likewise, Elemental Skill or Elemental Burst hits increase Normal Attack DMG by 30% for 6s.

R4: Solar Shine

Normal Attack hits increase Elemental Skill and Elemental Burst DMG by 35% for 6s. Likewise, Elemental Skill or Elemental Burst hits increase Normal Attack DMG by 35% for 6s.

R5: Solar Shine

Normal Attack hits increase Elemental Skill and Elemental Burst DMG by 40% for 6s. Likewise, Elemental Skill or Elemental Burst hits increase Normal Attack DMG by 40% for 6s.

Your support is more valuable than a primogem.