Refinements:

R1: Infusion Blade

On hit, Normal or Charged Attacks increase ATK and DEF by 6% for 6s. Max 4 stacks. This effect can only occur once every 0.5s.

R2: Infusion Blade

On hit, Normal or Charged Attacks increase ATK and DEF by 7.5% for 6s. Max 4 stacks. This effect can only occur once every 0.5s.

R3: Infusion Blade

On hit, Normal or Charged Attacks increase ATK and DEF by 9% for 6s. Max 4 stacks. This effect can only occur once every 0.5s.

R4: Infusion Blade

On hit, Normal or Charged Attacks increase ATK and DEF by 10.5% for 6s. Max 4 stacks. This effect can only occur once every 0.5s.

R5: Infusion Blade

On hit, Normal or Charged Attacks increase ATK and DEF by 12% for 6s. Max 4 stacks. This effect can only occur once every 0.5s.

Your support is more valuable than a primogem.