In Zenless Zone Zero, PEN Ratio is a core combat stat that dictates your ability to pierce enemy defenses. As you push into late-game content, enemy DEF pools surge exponentially—and mastering how to stack PEN Ratio is the line between chipping away at a boss and melting their health bar. LootBar delivers your definitive breakdown of PEN Ratio to help you dominate the battlefield. To increase store profits and overcome complex in-game challenges, you can choose LootBar’s safe, discounted Zenless Zone Zero top-up for instant resource upgrades.
The Definition of PEN and PEN Ratio
There is a fundamental difference between PEN and PEN Ratio. While both reduce the impact of enemy DEF by lowering the target’s effective defense value, they scale drastically differently based on the opponent’s toughness—making each suited for distinct combat scenarios:
PEN Ratio grants a percentage-based reduction to the enemy’s DEF. Its core advantage lies in scaling with the target’s DEF: the higher the enemy’s defense, the greater the absolute DEF value negated. This makes it the definitive choice for countering high-toughness targets like Elite enemies and Ethereal bosses.
PEN subtracts a fixed value directly from the enemy’s DEF. It excels at quickly neutralizing low-defense foes but suffers from severe diminishing returns against high-DEF endgame targets. When facing enemies with DEF far exceeding your flat PEN value, its damage boost becomes negligible.
Notes：With the same ATK, both PEN and PEN Ratio enhance boss damage—but for endgame progression, PEN Ratio is unequivocally superior. It scales synchronously with enemy strength, ensuring your damage remains consistent even against the tankiest opponents in high-difficulty content.
Key Paths to High PEN Ratio
The primary sources of PEN Ratio are Drive Discs and W-Engines. Below are the meta-defining options currently in the game, categorized by usability and agent specialization:
Drive Discs
Puffer Electro Set
The Puffer Electro set is the gold standard for burst DPS agents requiring armor penetration. Its universal 2-piece bonus makes it a staple in most endgame builds, while the 4-piece bonus complements ultimate-focused burst playstyles.
2-Piece Bonus: +8% PEN Ratio. This is a bonus suitable for nearly all DPS agents, providing immediate and consistent penetration utility without conditional requirements.
4-Piece Bonus: +20% Ultimate DMG. Additionally, casting an Ultimate increases the wearer’s ATK by 15% for 12 seconds.
Notes: For balanced high-damage builds, pair the 2-piece Puffer Electro set with a 4-piece elemental set. This combination retains the critical PEN Ratio boost while maximizing elemental damage output. For pure burst-focused agents, a full 4-piece Puffer Electro set is also viable to amplify ultimate burst potential.
How to get PEN Ratio Drive Discs
To secure the PEN Ratio-boosting Puffer Electro set—whether you’re farming for free or prioritizing fast acquisition—here are the tailored strategies for each player type:
For F2P Players：
- Hollow Zero: Clear daily and weekly Hollow Zero challenges to earn Drive Disc Caches, which have a chance to drop the Puffer Electro set.
- Inter-Knot Rewards: Claim Drive Disc Caches from Inter-Knot Level progression milestones.
- Exchange Shops: Use Hollow Zero Tokens or Signal Badges to purchase random Drive Disc Caches from the in-game exchange shops.
For Whale Players：
- Limited-Time Events: Purchase premium Drive Disc Caches from event shops using paid currencies for a higher drop rate of meta sets.To secure the Drive Discs you need, top up Zenless Zone Zero via LootBar. LootBar provides secure, discounted top-up services accelerate gear acquisition and gameplay progress, helping you gain the resources to dominate every battle.
- Direct Purchase: Use Polychromes to buy targeted Drive Disc Caches from the in-game store, accelerating the acquisition of a full 4-piece Puffer Electro set.
W-Engines
Magnetic Storm (B-Rank)
Specialty：Anomaly
Main Stat: PEN Ratio (6.4% – 16%)
Passive “Charge Overload”: When any squad member inflicts an Attribute Anomaly on an enemy, the equipper gains 3.5 Energy (triggers once every 12 seconds). Suitable for early to mid-game progression before acquiring higher-rank W-Engines.
Slice of Time (A-Rank)
Specialty： Support
Main Stat: PEN Ratio (8% – 20%)
Passive “Say Cheese”: When any squad member performs a Dodge Counter, EX Special Attack, Assist Attack, or Chain Attack, the equipper gains 20/25/30/35 additional Decibels and 0.7 Energy. Passive effects of the same name do not stack. Great for support agents who need to accelerate squad Decibel generation and ultimate rotation.
Fusion Compiler (S-Rank)
Specialty：Anomaly
Main Stat: PEN Ratio (9.6% – 24%)
Passive “Data Flood”: When using a Special Attack or EX Special Attack, increases the equipper’s Anomaly Proficiency by 25 for 8 seconds. Perfect for Anomaly DPS agents who rely on frequent skill casts to trigger elemental anomalies.
Weeping Cradle (S-Rank)
Specialty：Support
Main Stat: PEN Ratio (9.6% – 24%)
Passive “Punishment”: While off-field, the equipper gains 0.6~1.2 Energy per second. When the equipper attacks, all allies deal 10~20% more damage to the struck target for 3 seconds—this damage boost increases by 1.7~3.3% every 0.5 seconds, up to a maximum additional 10.2~19.8%. Repeated triggers refresh the duration but not the damage boost stack. Ideal for off-field support agents who provide team-wide damage amplification.
How to get PEN Ratio W-Engines
Acquisition pathways vary significantly between free-to-play and whale players, with targeted strategies to secure the optimal gear for your progression stage:
For F2P Players：
- Signal Shop: Exchange Signal Badges for W-Engine Caches (B/A-Rank focus) on a weekly rotation.
- Event Rewards: Earn free W-Engine Caches from limited-time event milestones and login bonuses.
- Inter-Knot Progression: Claim B/A-Rank W-Engine Caches from Inter-Knot Level rewards. F2P players should prioritize farming Magnetic Storm andSlice of Time for reliable early.
For Whale Players：
- Limited-Time Banners: Pull featured W-Engine banners with Encrypted Master Tapes for a guaranteed shot at meta S-Rank options.Secure your dream W-Engines fast with LootBar’s Guaranteed Bundle: 29,210 Monochrome Film for 180 pulls, at a discounted price to supercharge your grind.Backed by a 4.9/5 rating from 30,000+ reviews, LootBar guarantees 100% secure transactions, full refunds if needed, and 24/7 support for a seamless gaming journey.
- Paid Event Shops: Purchase premium W-Engine Caches from event shops using paid Polychromes for targeted S-Rank drops.
Tips for Optimizing PEN & PEN Ratio
1. Balance PEN Ratio with Offensive Stats
While PEN Ratio is critical for damage penetration, it does not directly increase your raw damage. Never neglect ATK% and CRIT stats in pursuit of excessive PEN Ratio. A healthy balance is key: PEN Ratio ensures your damage gets through enemy defenses, but ATK% and CRIT determine how much damage you deal in the first place. For most DPS agents, aim to keep CRIT Rate above 60% before prioritizing high PEN Ratio stacks.
2. Match Penetration Type to Enemy Difficulty
Flat PEN becomes more valuable when the enemy’s level is close to your agents’, but it’s nearly useless in endgame content like Shiyu Defense—where enemies are level 60-70 with massive DEF pools. This is where Puffer Electro sets and S-Rank W-Engines truly shine: their percentage-based penetration ensures consistent damage output even against the game’s toughest foes.
3. The Rina Factor
If your squad includes Alexandrina, prioritizing PEN Ratio on her is non-negotiable. Her core passive “Mini Destruction Partner” grants a portion of her own PEN Ratio to all squad members—turning every ally into a tank-shredding threat. For Rina builds, aim for max-roll PEN Ratio on her W-Engine and 2-piece Puffer Electro to maximize teamwide damage efficiency.
Conclusion
Mastering PEN Ratio is the final pillar of optimizing combat efficiency in Zenless Zone Zero. By strategically equipping the right W-Engines and Drive Discs, you can reduce even the most formidable Ethereal bosses to glass cannons in seconds.Looking to fast-track your acquisition of coveted Drive Discs and W-Engines? LootBar is your trusted solution for supercharging your progress—backed by a stellar 4.9/5 rating from 30,000+ player reviews, plus 100% secure transactions, hassle-free full refunds, and 24/7 customer support to keep your gaming journey seamless. LootBar offers secure, discounted Zenless Zone Zero top-up that save you time and money—unlocking the resources you need to maximize gameplay, and dominate every battle
