Overview
Shorekeeper is a 5★ Spectro Rectifier Healer from Black Shores and the featured sustain of Version 3.6. She fields a short cycle, drops a Resonance Liberation that is as much a team buff as a heal, then outros so the carry inherits the window.
Rotation
Shorekeeper intros, spends Resonance Skill and Forte Circuit to bank Concerto, casts Resonance Liberation when the team needs the buff, and outros. The amplifier then outros into the carry. Do not park her for a full Basic loop.
Strengths
Best general healer and team buff in the game. Fits every premium three-resonator core. Sequence 0 is complete.
Weaknesses
Not a damage carry. CRIT echoes with no Energy Regen make the outro late. Cannot occupy two Tower sides at once.
Investment
Glow set before a second damage sonata. Energy Regen on 3-cost and 1-cost pieces. Stellar Symphony is a Convene luxury. Waveplates here early raise every carry you already own.
Common Mistakes
Building her as Spectro DPS. Skipping Variation for Cosmic Ripples with no ER. Holding the field after Concerto is full. Treating her as a fourth slot in a copied screenshot.