You can reliably grow Bear Hunt damage without spending. Here is the priority order from a free-to-play viewpoint.



Level these to Lv5 and spread the 4 slots across DMG/ATK; F2P joiner buffs work fine.

The most cost-effective stat for F2P is actually Lethality. Bear Hunt damage is fundamentally "Attack × Lethality," so a high value on only one side won't scale. Many F2P players watch only attack and neglect lethality, but raising both in balance produces more total damage.
The main F2P ways to raise lethality are charms (crit+HP), hero gear headgear/boots (lethality bonus), and the battle research tree. Hero gear especially: "headgear and boots are the two lethality pieces," so the community standard is to forge those first. You can get mythic gear F2P from the Arena shop, so aim for one mythic set per troop type.
For F2P, the order of "when to invest in what" matters most. The rough community-shared flow:



The key point: Fire Crystal level and Tier are separate axes. Rather than rushing T11, raising FC to boost all troop types is often more efficient for F2P.
Mistakes the overseas community repeatedly warns about: (1) investing in defense/HP buffs — the bear doesn't counterattack, so it's wasted; focus only on attack/lethality. (2) using a pet's defense skill — same reason, prioritize attack/lethality pets. (3) spreading gear upgrades thin — the community consensus is "level only two pieces per hero." Spreading thin can't even beat a single mythic piece. The more limited your resources (F2P), the more "concentrated investment" wins.
To back up "F2P really can grow," here are the spending-independent factors from Altema's per-factor verification (featured by the official WOS Japan X account). Open if you want the numbers.
| Factor | Measured gain | F2P accessibility |
|---|---|---|
| Damage-buff skill heroes equipped | ~+33% | ◎ possible with free heroes |
| Hero levels raised | ~+15% | ◎ solved with time |
| Troop buff items used | ~+10% | ◎ from event rewards |
| Chief gear upgraded | ~+3.7% | ○ slow but steady |
| Pet skill active | ~+1% | ◎ don't forget it |
Add the Cyrille talent from this article (up to +30%, expert XP only) and the total F2P-reachable bonus is substantial. Going SSR on heroes (~+210% measured) takes time but is reachable free through recruitment.
Source: Altema, "Bear Hunt damage verification" (JP). The accessibility ratings are ours.
F2P Bear Hunt grows with "full troops x right left hero x Cyrille talent". Use the simulator's upgrade advice to see which helps most for your stats.