fn eligible_effective_candidates(
binding: RotationSpellBinding,
spells: &[SpellData],
mode: RotationDecisionMode,
) -> [Option<LocalSpellIdx>; 2]fn eligible_effective_candidates(
binding: RotationSpellBinding,
spells: &[SpellData],
mode: RotationDecisionMode,
) -> [Option<LocalSpellIdx>; 2]