Leader attack-hero skills. The leader drives Bear Hunt damage. Raising the expedition skill level of DMG/ATK leaders (e.g. Jeronimo) makes the investment apply to every rally. Best ROI.
Exclusive gear levels. Mythic heroes' exclusive gear with rally ATK/Lethality bonuses (Jeronimo, Natalia) turns gear level directly into rally bonus.
Hero gear. The 4 gear pieces a hero equips raise troop ATK/Lethality stats — the stats that matter against the bear — boosting both leaders and joiners.
Charms. Charms that raise per-type ATK/Lethality lift your base bear damage. Materials are heavy, so focus on ATK/Lethality.
Research speedups. ATK/Lethality research is slow, so speedups pay off long-term — a non-wasteful way for light spenders to save time.
Hero star upgrades (shards). Raising star level with hero shards boosts stats and skills. Strong but needs many shards to max; light spenders should focus on one core hero.
GREG'S NOTE
What about gems? Rather than raising damage directly, gems are best spent on shop purchases and speedups to obtain the materials/shards above. For Bear Hunt, exchange them for hero shards (star up your core) or gear/charm upgrade materials. Decide on 1-2 heroes before spending, instead of random pulls.
MOLLY'S TIP
The light-spender rule: concentrate on your core over spreading thin. Focusing skills, exclusive gear and stars on 1-2 attack leaders is more efficient for Bear Hunt.
What to avoid
AHMOSE'S WARNING
Defer things the bear ignores: defensive-troop gear effects, HP skills, and city-defense effects don't apply to bear damage (since 2025, city-defense exclusive-gear skills no longer affect battlefield structure defense either). Also, spending on joiner heroes won't help, since only the left hero's first skill applies.
The ROI of exclusive gear and charms
The highest value-for-money for light spenders is your main heroes' exclusive gear and charms. Exclusive gear scales with generation, raising hero attack, lethality and command bonus (troop lethality) together. The community says "if you spend, concentrate first on the exclusive gear of the 3 rally leaders you use in Bear Hunt." Focus on the heroes you actually lead with, not thin-and-wide.
Charms raise troop lethality and HP. Since lethality directly drives Bear Hunt damage, charms are a high-ROI way to shore up lethality when your stats lean toward attack. The more your attack outpaces your lethality, the more charm investment lifts your total damage.
When to use "2-hour boosts"
Light spenders often overlook gem-purchasable 2-hour boosts (all-troop ATK +10%, etc.). The community recommends "spend the 10% boosts freely on Bear Hunt and Intel, but save 20% boosts for State-vs-State and castle events." Bear Hunt is a short point race, so timing an attack/lethality boost well can create a point gap worth more than its cost.
Reference: measured gain per factor (a yardstick for spending)
To judge "how many % is this purchase actually buying," Altema's per-factor measurements (featured by the official WOS Japan X account) work well as a yardstick against this article's ranking.
For light spenders: leader skills → exclusive gear → hero gear/charms → research speedups → star upgrades. Check "how much each upgrade adds" in the simulator before spending.