Refinements:

R1: Slingshot

If a Normal or Charged Attack hits a target within 0.3s of being fired, increases DMG by 36%. Otherwise, decreases DMG by 10%.

R2: Slingshot

If a Normal or Charged Attack hits a target within 0.3s of being fired, increases DMG by 42%. Otherwise, decreases DMG by 10%.

R3: Slingshot

If a Normal or Charged Attack hits a target within 0.3s of being fired, increases DMG by 48%. Otherwise, decreases DMG by 10%.

R4: Slingshot

If a Normal or Charged Attack hits a target within 0.3s of being fired, increases DMG by 54%. Otherwise, decreases DMG by 10%.

R5: Slingshot

If a Normal or Charged Attack hits a target within 0.3s of being fired, increases DMG by 60%. Otherwise, decreases DMG by 10%.

Your support is more valuable than a primogem.