Many game modes, such as Arena, Arena Assault, and Tempest Trials+, feature 'bonus units' that grant significant score multipliers or stat boosts. Always try to include at least one bonus unit in your team for these modes. For Arena, higher merge levels, higher rarity, and more expensive skills (e.g., 'Distant Counter', 'Legendary' weapons) contribute to a higher 'BST' (Base Stat Total) score. For Tempest Trials+, using bonus units not only boosts your score but also grants stat bonuses, making runs easier. Maximizing these bonuses is crucial for climbing leaderboards and earning top-tier rewards.
