Refinements:

R1: Infusion Arrow

Normal Attack and Charged Attack hits increase ATK by 4% and Normal ATK SPD by 1.2% for 6s. Max 4 stacks. Can only occur once every 0.3s.

R2: Infusion Arrow

Normal Attack and Charged Attack hits increase ATK by 5% and Normal ATK SPD by 1.5% for 6s. Max 4 stacks. Can only occur once every 0.3s.

R3: Infusion Arrow

Normal Attack and Charged Attack hits increase ATK by 6% and Normal ATK SPD by 1.8% for 6s. Max 4 stacks. Can only occur once every 0.3s.

R4: Infusion Arrow

Normal Attack and Charged Attack hits increase ATK by 7% and Normal ATK SPD by 2.1% for 6s. Max 4 stacks. Can only occur once every 0.3s.

R5: Infusion Arrow

Normal Attack and Charged Attack hits increase ATK by 8% and Normal ATK SPD by 2.4% for 6s. Max 4 stacks. Can only occur once every 0.3s.

Your support is more valuable than a primogem.