From FFXI Wiki
- Increases the strength of the next weapon skill used.
- Boost is dependent upon the number of Finishing moves consumed.
- With 20 Job Points in the relative category, Building Flourish also grants 20% Weapon Skill Damage regardless of the number of Finishing Moves spent.
- Accuracy, Attack and Critical Hit Rate apply to all hits of Weapon Skill, but WSD only applies to first hit.