Rarity:UR heroes are your long-term team. SSR heroes are strong early, and some can be promoted to UR in a particular season. SR heroes are early filler.
Type: Tank, Aircraft or Missile. Since Season 6, the best squads use five heroes of the same type.
Row: front-row heroes soak up damage; back-row heroes deal it or support the team.
Verdict:
Build means worth full investment.
Early means good until your UR heroes are ready.
Placeholder means use it, but don't spend rare items on it.
Promotion to UR: one SSR hero per season: Mason (S1), Violet (S2), Scarlett (S3), Sarah (S4), Venom (S5), Braz (S6). You need the hero at 5 stars plus a UR Hero Badge from the season goals. After promotion the hero drops back to 3 stars and their skills reset.
Exclusive Weapons unlock in weeks 1, 3 and 6 of each season:
Season
Heroes
1
Kimberly, DVA, Tesla
2
Murphy, Carlie, Swift
3
Marshall, Schuyler, McGregor
4
Lucius, Adam, Williams
5
Fiona, Stetmann, Morrison
Awakening (Season 6): Kimberly (week 1), DVA (week 3) and Tesla (week 5). The hero needs 5 stars and an Exclusive Weapon at level 20 or higher, and the Awakening skill replaces their Expertise skill.
Compiled from community guides and tier lists (last checked October 2026). Some sources sell top-ups or accounts, so we cross-checked them against independent guides.