You want her "Special" cocktails ready at all times. The Verdict
By applying the state, Burnice deals passive Fire damage even when she’s tucked away in your backline. This allows her to "slay" enemies while your main DPS takes the spotlight, creating a constant stream of Fire Anomaly buildup that leads to massive Burn procs. 2. Slaying the "Holes": Burnice in Hollow Zero a burnice special for her broken holes slayed link
This is non-negotiable. It increases the damage of her Burn and Disorder procs. You want her "Special" cocktails ready at all times