Refinements:

R1: Aqua Remembrance

Max HP increased by 20%. Once every 15s, for the 14s after using an Elemental Skill: Gain 4 Scorching Summer stacks. Each stack increases Normal Attack DMG by 12%. For the duration of the effect, once every 1.5s, lose 1 stack after a Normal Attack hits an opponent; once every 1.5s, gain 1 stack after triggering a Vaporize reaction on an opponent. Max 4 Scorching Summer stacks.

R2: Aqua Remembrance

Max HP increased by 25%. Once every 15s, for the 14s after using an Elemental Skill: Gain 4 Scorching Summer stacks. Each stack increases Normal Attack DMG by 15%. For the duration of the effect, once every 1.5s, lose 1 stack after a Normal Attack hits an opponent; once every 1.5s, gain 1 stack after triggering a Vaporize reaction on an opponent. Max 4 Scorching Summer stacks.

R3: Aqua Remembrance

Max HP increased by 30%. Once every 15s, for the 14s after using an Elemental Skill: Gain 4 Scorching Summer stacks. Each stack increases Normal Attack DMG by 18%. For the duration of the effect, once every 1.5s, lose 1 stack after a Normal Attack hits an opponent; once every 1.5s, gain 1 stack after triggering a Vaporize reaction on an opponent. Max 4 Scorching Summer stacks.

R4: Aqua Remembrance

Max HP increased by 35%. Once every 15s, for the 14s after using an Elemental Skill: Gain 4 Scorching Summer stacks. Each stack increases Normal Attack DMG by 21%. For the duration of the effect, once every 1.5s, lose 1 stack after a Normal Attack hits an opponent; once every 1.5s, gain 1 stack after triggering a Vaporize reaction on an opponent. Max 4 Scorching Summer stacks.

R5: Aqua Remembrance

Max HP increased by 40%. Once every 15s, for the 14s after using an Elemental Skill: Gain 4 Scorching Summer stacks. Each stack increases Normal Attack DMG by 24%. For the duration of the effect, once every 1.5s, lose 1 stack after a Normal Attack hits an opponent; once every 1.5s, gain 1 stack after triggering a Vaporize reaction on an opponent. Max 4 Scorching Summer stacks.

Your support is more valuable than a primogem.