Refinements:

R1: Smashed Stone

On hit, Normal or Charged Attacks increase ATK and DEF by 4% for 6s. Max 4 stacks. This effect can only occur once every 0.3s.

R2: Smashed Stone

On hit, Normal or Charged Attacks increase ATK and DEF by 5% for 6s. Max 4 stacks. This effect can only occur once every 0.3s.

R3: Smashed Stone

On hit, Normal or Charged Attacks increase ATK and DEF by 6% for 6s. Max 4 stacks. This effect can only occur once every 0.3s.

R4: Smashed Stone

On hit, Normal or Charged Attacks increase ATK and DEF by 7% for 6s. Max 4 stacks. This effect can only occur once every 0.3s.

R5: Smashed Stone

On hit, Normal or Charged Attacks increase ATK and DEF by 8% for 6s. Max 4 stacks. This effect can only occur once every 0.3s.

Your support is more valuable than a primogem.