Soline: Frost Ticket

Water

Shotgun

Supporter

Burst 1

Elysion

I'll Check Your Ticket!

■ Activates at the start of battle or when using Burst Skill. Affects all allies.
Issues 1 ticket, up to a maximum of 2. Continuous.
Ticket effect: Max HP ▲ number of tickets × 10% of the caster's Max HP (does not restore HP).
■ Activates when entering Full Burst. Affects all allies.
Cooldown of Burst Skill ▼ 7.48 sec.
Removes First Train Discount.
■ Activates when the HP of anyone in the squad is lower than 15%. Affects the target if the target has any tickets.
Recovers 12.27% of caster's final max HP as HP.
Ticket count ▼ 1.

I'll Help You Board the Train!

■ Activates at the start of battle. Affects all allies.
First Train Discount for 6 sec.
Function: The effects of "I'll Help You Board the Train!" will not consume tickets.

I'll Get You There Safely!

40 sec Cooldown

■ Affects all allies.
Recovers 32.26% of caster's final max HP as HP.

Emergency Recovery

■ Activates when killing a radial enemy. Affects this unit's squad.
Recovers 10.5% of damage.

Skill recommendations

Skill 1

Skill 2

Burst

Build

Cube: Does not matter what cube she uses. Quantum for extra burst generation is nice, since her damage is lackluster and you rarely burst with her.

OL Gear: Just like the cube, it does not matter what stats you get since her only job is to provide CDR. Not worth to OL unless you really like her.

Pros & Cons

Cheap CDR option that can help dish out more damage on specific team compositions. She's the third 7.48 second CDR unit we get, and that's the new standard, making her get some usage even if the rest of her kit it's completely useless
If she's used on the SG team (Tove, Drake and Grave or any other B2) you can actually run her as sub DPS, but not really worth the investment unless you are a try hard in raids

Outside of CDR on skill 1, she's a brick that does nothing for your team nor provides damage herself
Even if her heals can be used in a pinch, it's quite conditional. Either tied to her burst (40 seconds) or when a unit HP drops below 15%. Even worse, HP threshold heals can only be done once and then you need to burst in order to obtain more tickets to be able to proc it again

Extra notes

Her CDR alone will probably make her a good pick for raids because fast rotations are sometimes better than a buffer unit. If she is not used on Shotgun compositions with units like Tove and Drake, she loses most of her damage, since she becomes a CDR battery and nothing else.