Seraphine vs Tristana

Make Surround Sound (W) your third basic spell: Stage Presence (passive) casts it twice, and the second, cast while shielded, heals your allies.

Cast Beat Drop (E) on enemies that are already slowed: they're rooted, and those already immobilized are stunned.

Save High Note (Q) for a wounded target: its damage grows with the health they've lost.

Cast Encore (R) through an ally toward the enemies: each champion hit, allies included, extends the spell's range.

Don't stay glued to your minions: when her autos kill them, Explosive Charge (E) damages nearby enemies, and her bomb also explodes in an area.

Back off as soon as Explosive Charge (E) is stuck on you: each of her hits makes it stronger, and a bomb that explodes at max stacks resets Rocket Jump (W).

When she activates Rapid Fire (Q) in a fight, back off until the bonus ends, or stun her if you can: her attack speed spikes for the spell's duration.

In teamfights, when Explosive Charge (E) is on you, spread out from your allies: when it explodes, the bomb also damages anyone near you.