Rocketboo is the definitive fire team choice in Zenless Zone Zero 1.4, delivering 100% increased Fire Anomaly Buildup on Chain Attacks with two Fire Attribute agents. Level 60 stats hit 8541 ATK with specialized synergies for Soldier 11, Lucy, Koleda, and Ben. This tier list explains Rocketboo's S-tier ranking and optimization strategies.
ZZZ 1.4 Bangboo Tier List Overview
Bangboos are active combat participants providing damage amplification, elemental synergy, and tactical utility. They execute Active Skills during combat and participate in Chain Attacks that shift battle momentum. Version 1.4's meta shifts elevated elemental specialists—particularly Rocketboo—to essential status.
Tier list updated December 30, 2025 reflects endgame performance across Shiyu Defense, Hollow Zero, and Combat Commissions. Bangboos generate value through three systems: Active Skills (manual triggers), Chain Attacks (condition-based activation), and Additional Abilities (permanent passive bonuses with team requirements).
For fire team optimization, secure Rocketboo through Signal Search. Zenless Zone Zero Monochromes available through BitTopup with competitive pricing and instant delivery.
What Changed in Version 1.4
Version 1.4 introduced elemental-focused content rewarding specialized team building. Fire Anomaly mechanics received attention, with damage-over-time scaling aggressively in new Shiyu Defense floors. This directly benefits Rocketboo's Refueling ability amplifying Fire Anomaly Buildup.
The meta favors Bangboos with conditional passives activating with two matching-element agents. Rocketboo's 100% Fire Anomaly Buildup increase (Skill Rank 4-6) is exponentially more valuable than previous patches prioritizing elemental diversity.
Tier List Methodology
Rankings evaluate: raw damage contribution, passive value, team flexibility, and resource efficiency. S-tier excels in 3+ categories with no significant weaknesses. A-tier performs well but has conditional requirements. B/C-tier serve niche roles with limited applicability.
Complete Bangboo Tier List for Version 1.4
S-Tier: Meta-Defining Choices
Rocketboo - Fire team leader with unmatched Fire Anomaly amplification. Level 60: 4210 HP, 8541 ATK, 723 DEF, 99 Impact. Active Skill Boom! charges targets dealing Fire DMG with Fire Anomaly Buildup. Chain Attack Ka-Boom Express Shipping explodes for massive Fire DMG across large area with substantial Fire Anomaly Buildup.
Safety - Belobog Heavy Industries specialist. 8863 ATK at Level 60. With two Belobog characters, increases Chain Attack DMG by 20%.
Butler - Victoria Housekeeping Co. support. 7896 ATK, 5095 HP at max level. Increases Energy Regen by 20% with two Victoria Housekeeping characters.
A-Tier: Solid Performers
Amillion - Cunning Hares focus. 8863 ATK, 4210 HP. Chain Attack damage boost with two Cunning Hares agents, but limited roster restricts flexibility.
Sharkboo - Ice teams. 8057 ATK, 723 DEF. Increases Active Skill Anomaly Buildup by 80% with two Ice agents—trails Rocketboo's Chain Attack bonus due to cooldown limitations.
Red Moccus - Sons of Calydon. Increases Active Skill damage by 36% with two faction members. Consistent value but lacks multiplicative Chain Attack scaling.
B-Tier and C-Tier: Situational
Belion - B-tier with unique mechanic: Agent Ultimate usage decreases Active Skill cooldown to 4 seconds. Requires specific ultimate-focused team building.
C-tier lacks elemental synergies or provides generic stat bonuses without multiplicative scaling. Viable early-game but replace with specialized alternatives.
Why Rocketboo is Essential for Fire Teams
Fire Damage Amplification Mechanics
Refueling Additional Ability activates with two Fire Attribute characters. 100% increased Fire Anomaly Buildup on Chain Attacks (Skill Rank 4-6, 80% at Rank 1) doubles Anomaly accumulation during high-damage windows. Fire Anomaly inflicts burning damage-over-time scaling with initial hit and accumulated buildup—making this exponentially valuable.
Chain Attacks trigger during character switches, creating rotation points where all three team members contribute simultaneously. Rocketboo's participation with doubled Anomaly Buildup means faster burning status, triggering additional damage instances and frequent Anomaly detonations.
Ka-Boom Express Shipping covers large area, addressing fire teams' weakness against spread formations. Explosive radius applies Anomaly Buildup to multiple targets simultaneously.
Version 1.4 Meta Shifts
Version 1.4 introduced higher enemy HP pools and tighter damage-check timers. These favor damage-over-time strategies maintaining pressure during defensive phases. Fire Anomaly's burning continues dealing damage during invulnerability windows.
New Shiyu Defense floors feature elemental vulnerability windows—brief periods where matching-element damage deals substantially increased damage. Rocketboo rapidly stacks Fire Anomaly to trigger burning during critical windows.
Version 1.4 rebalanced Bangboo acquisition: Stable Gacha, Bangboo Channel (1 Boopon), Signal Search, Hollow Zero Rally Commissions, Bangbuck Exchange, and Events. Accessibility ensures realistic obtainment without excessive investment.
Rocketboo vs Other Fire Options
Direct fire-element Bangboo alternatives are limited. Generic offensive Bangboos like Amillion provide raw damage but lack elemental synergy. Butler offers Energy Regen for Victoria Housekeeping, but fire agents span multiple factions (Soldier 11/Obol Squad, Lucy/Sons of Calydon, Koleda and Ben/Belobog), making faction bonuses less applicable than elemental bonuses.
Critical distinction: multiplicative vs additive scaling. Rocketboo's 100% Fire Anomaly Buildup multiplies with fire agents' inherent Anomaly stats, W-Engine bonuses, and Disk Drive effects. Fire teams with Rocketboo reach burning 40-50% faster than identical teams using non-specialized Bangboos.
Rocketboo Skills Breakdown
Active Skill: Boom!
Rocketboo mounts rocket, charges target, detonates for Fire DMG across area with Fire Anomaly Buildup. Moderate cooldown allows 2-3 activations per Shiyu Defense encounter. Area-of-effect guarantees hits against mobile enemies.
Fire Anomaly Buildup stacks with agents' normal attacks and abilities. Strategic timing—activating before Chain Attack windows—pushes enemies over Anomaly threshold for immediate burning.
Positioning matters: charges in straight line toward target, potentially passing through multiple enemies. Angle activation to maximize multi-target hits.
Additional Ability: Refueling
Activates automatically with two Fire Attribute characters. 100% increased Chain Attack Fire Anomaly Buildup (higher Skill Ranks) applies multiplicatively to Ka-Boom Express Shipping base Anomaly value.
Skill Rank progression: Rank 1 provides 80%, Ranks 4 and 6 unlock full 100%. Prioritize upgrading to Rank 4 minimum. Rank 4 to 6 offers diminishing returns vs agent upgrades.
Passive nature means no activation requirement or cooldown. Accessible to all skill levels with high performance ceiling.
Energy Generation and Decibel Synergy
Boom! generates moderate Decibel Rating on hit, contributing to faster Chain Attack availability. In fire teams with high attack speed agents like Soldier 11, Decibel generation accelerates naturally.
Synergy loop: fire agents build Decibel Rating → Chain Attack available → Rocketboo participates with 100% increased Fire Anomaly Buildup → burning triggers faster → burning damage contributes to faster defeat → shorter encounters allow more runs in time-limited content.
Best Fire Team Compositions
Soldier 11 + Qingyi + Lucy + Rocketboo
Soldier 11 (Obol Squad, Fire Attack Slash) primary DPS with rapid attacks building Anomaly. Qingyi provides Stun for damage windows. Lucy (Sons of Calydon, Fire Support Strike) offers buffs and satisfies Rocketboo's two-fire requirement.
Rotation: Qingyi Stun buildup → Lucy buffs and Fire Anomaly → Soldier 11 primary damage → Rocketboo Chain Attack during switches with massive Fire Anomaly → burning activates → repeat.
Investment priority: Soldier 11 damage stats → Rocketboo to Skill Rank 4 → Lucy Support capabilities.
Koleda + Ben + Lucy + Rocketboo
Koleda (Belobog, Fire Stun Strike) and Ben (Belobog, Fire Defense Strike) create faction core while contributing Fire Anomaly. Lucy completes fire trio. Emphasizes survivability through Ben's defense while maintaining aggressive Anomaly stacking.
Rotation: Ben defensive positioning → Koleda Stun and Fire Anomaly → Lucy buffs → Chain Attacks with Rocketboo accelerate burning → burning supplements direct damage.
F2P Fire Team Options
Lucy obtainable through standard progression provides second fire agent for Refueling. Pair with any fire DPS (even A-rank). Third slot accommodates Stun or Support based on roster.
Rocketboo accessible through Signal Search, Hollow Zero Rally Commissions, Bangbuck Exchange, and Events. Realistically obtainable for F2P through consistent endgame engagement.
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Optimal Skill Rotation
Maximize Chain Attack frequency during high-value windows. Build Decibel Rating through normal attacks and skills. When Chain Attack available, execute character switches ensuring Rocketboo participates with doubled Fire Anomaly Buildup.
Between Chain Attacks, use Boom! strategically: during enemy vulnerability, when enemies cluster, or before Chain Attack opportunities to push Anomaly over burning threshold. Avoid during invulnerability phases.
Advanced: manipulate enemy positioning to maximize Boom! effectiveness. Charge through multiple enemies or hit against walls preventing knockback.
How to Obtain and Upgrade Rocketboo
Acquisition Methods
Six channels:
Stable Gacha: Standard Bangboo pool
Bangboo Channel: 1 Boopon guaranteed
Signal Search: Deterministic farming
Hollow Zero Rally Commissions: Endgame rewards
Bangbuck Exchange: Currency purchase
Events: Periodic rewards
Signal Search most reliable for targeted acquisition. Hollow Zero provides passive opportunities while farming materials.
Required Materials
Level 1 (306 HP, 69 ATK) to Level 60 (4210 HP, 8541 ATK):
Level 10→20: 15,000 Dennies + 4 Ether Electrolyte
Level 20→30: 35,000 Dennies + 12 Energy Transfer Fluid
Level 30→40: 75,000 Dennies + 20 Energy Transfer Fluid
Level 40→50: 125,000 Dennies + 10 Concentrated Cooling Fluid
Level 50→60: 250,000 Dennies + 20 Concentrated Cooling Fluid
Total: 500,000 Dennies, 4 Ether Electrolyte, 32 Energy Transfer Fluid, 30 Concentrated Cooling Fluid. Moderate cost vs agent upgrades.
Farming Routes
Ether Electrolyte from early Combat Commissions and Hollow Zero. Energy Transfer Fluid in mid-game content. Concentrated Cooling Fluid endgame bottleneck from high-level Hollow Zero and weekly bosses.
Prioritize Level 40 initially—substantial stats using only mid-game materials. Level 40→60 demands Concentrated Cooling Fluid competing with agent upgrades.
Advanced Strategies for Endgame
Shiyu Defense Optimization
Shiyu Defense features timed encounters against high-HP enemies with elemental vulnerabilities. Rocketboo accelerates Fire Anomaly during critical windows, ensuring burning activates during vulnerability phases for maximum damage multiplication.
Single bosses: focus Chain Attacks during Stun windows. Multi-enemy waves: position Boom! to hit multiple targets spreading Fire Anomaly. Ka-Boom Express Shipping area ensures all enemies receive Anomaly Buildup.
Time optimization balances Anomaly Buildup with direct damage. Rocketboo's doubled Chain Attack Anomaly reduces investment period, allowing more time benefiting from burning.
Positioning and Timing
Boom! charges straight line creating positioning opportunities. In corridors, activate when enemies align in row. Against walls, charge pins enemies ensuring full damage without knockback.
Chain Attack timing should coincide with team buffs. If Lucy applied buffs, trigger Chain Attacks during window. Activate during enemy Stun when damage multipliers highest.
Avoid Chain Attacks during phase transitions or invulnerability. Anomaly Buildup may not register if enemies become invulnerable mid-attack.
Common Mistakes
Non-fire teams: Refueling requires two Fire Attribute characters. Without this, Rocketboo provides only base stats without 100% Fire Anomaly increase.
Neglecting Skill Rank: Rank 1 (80%) to Rank 4+ (100%) represents 25% relative improvement. Prioritize Rank 4 before other Bangboo upgrades.
Overvaluing Active Skill: Majority of value from Chain Attacks with doubled Anomaly. Prioritize Decibel Rating for frequent Chain Attacks.
Ignoring vulnerability windows: Save Chain Attacks for elemental vulnerability phases to double/triple effective damage.
Resource Investment Guide
Priority Hierarchy
Primary DPS to Level 50 → Rocketboo to Level 40 → Primary DPS to Level 60 → Rocketboo to Level 60 → Support agents. This ensures main damage dealer reaches effectiveness while Rocketboo provides multiplicative scaling.
Rocketboo Level 40 provides ~70% total stat gains using only mid-game materials. Optimal stopping point for budget players, reserving Concentrated Cooling Fluid for agents.
Skill Rank: Prioritize Rocketboo Rank 4 for full 100% Anomaly bonus before agent skill ranks beyond essential breakpoints.
Cost-Benefit Analysis
F2P: View Rocketboo as force multiplier. Fully upgraded Rocketboo with undergeared agents provides minimal value. Level 40 Rocketboo with well-invested agents delivers substantial gains. Investment should follow core agent development.
Low spenders: Accelerate acquisition through targeted Signal Search using premium currency for guaranteed Bangboo vs randomized agent gacha.
Material cost (500,000 Dennies, fluids) represents ~1 week focused farming for endgame players. Faster ROI vs agent upgrades requiring weeks.
Long-Term Value
Rocketboo scales with fire roster expansion. Each new fire agent increases applicability—functions with any two-fire combination. Future-proofing vs faction-specific Bangboos.
Fire remains core element with multiple agents spanning roles (DPS, Support, Stun, Defense). Ensures fire teams viable across content, protecting investment from meta obsolescence.
Future updates may introduce fire agents or Anomaly mechanics further amplifying value. Specialization in Fire Anomaly positions to benefit from future systems.
FAQ
Why is Rocketboo essential for fire teams in ZZZ 1.4? Provides 100% increased Fire Anomaly Buildup on Chain Attacks with two Fire agents, doubling Anomaly accumulation during high-damage windows. Triggers burning significantly faster, increasing total damage in time-limited endgame content.
What makes Rocketboo better than other fire Bangboos? Only Bangboo with dedicated Fire Anomaly amplification. 100% Anomaly Buildup multiplies with existing fire stats and equipment creating compound scaling generic ATK bonuses can't match.
Which fire agents synergize best with Rocketboo? Soldier 11 (Fire Attack Slash), Lucy (Fire Support Strike), Koleda (Fire Stun Strike), Ben (Fire Defense Strike). Any two fire agents activate Refueling. Optimal compositions balance DPS, Support, Stun while maintaining two-fire requirement.
How do I obtain Rocketboo? Available through Stable Gacha, Bangboo Channel (1 Boopon), Signal Search, Hollow Zero Rally Commissions, Bangbuck Exchange, Events. Signal Search provides deterministic acquisition. F2P can obtain through consistent endgame engagement.
Is Rocketboo worth investing resources? Yes for fire teams. Provides multiplicative damage scaling amplifying all fire output. Prioritize Level 40 and Skill Rank 4 for optimal cost-efficiency—majority of value with moderate investment. Without fire teams, invest in element-appropriate Bangboos instead.
What materials does Rocketboo need? 500,000 Dennies, 4 Ether Electrolyte, 32 Energy Transfer Fluid, 30 Concentrated Cooling Fluid for Level 1→60. Early upgrades use accessible materials. Final upgrades demand Concentrated Cooling Fluid from high-level Hollow Zero and weekly bosses. Budget to Level 40 first using mid-game materials.