Soline: Frost Ticket

A B1 Supporter Nikke used mainly for Burst Cooldown reduction.
She has value where cycle scores matter, like Solo Raid, but her priority drops in general squads.

I'll Check Your Ticket!1 issues tickets at battle start and on Burst use to raise allies' max HP band, and reduces all allies' Burst Skill Cooldown on Full Burst entry. I'll Help You Board the Train!2 consumes a ticket to give emergency healing when an ally's HP drops to 15% or lower. I'll Get You There Safely!B is a Burst focused on all-ally healing, used for recovery when survival is shaky.

Auto play works fine. In practice, the key is not using Soline's own Burst often but pairing her with another B1 so the team keeps getting Burst Skill Cooldown reduction on each Full Burst entry. Only time her Burst healing manually in phases where survival is shaky.

For off-burst CDR use, reload and Burst Gauge stability come first. If you also want damage support in Raids, you can use your highest-level Harmony Cube first.

Basically set Elemental Advantage damage and ATK first, and choose remaining lines from Max Ammo, Critical Rate, and Critical Damage based on Raid cumulative damage.

The key is S1's Burst Skill Cooldown reduction value. Reinforce S2 for survival stability, and invest in Burst last.

In Solo Raid and Union Raid, she is valuable for off-burst CDR. In Arena there is room to explore her as a conditional survival card, but she is hard to see as a fixed pick for general squads.

Her high Burst Skill Cooldown reduction value directly contributes to Raid cycle scores.

Her 40-second Burst structure and limited team buffs lower her priority in general PvE.