Last War Survival Wanted Boss: Code 39, 64 and 87

The Wanted Boss event is one of those daily events in Last War: Survival that a lot of players show up to with the wrong squad and wonder why their damage numbers are so much lower than everyone else on the leaderboard. Three bosses rotate through the week — Code 39, Code 64, and Code 87 — and each one has a specific troop type weakness that gives you a meaningful damage bonus if you match it. Each boss spawns four times a day at 00:00, 06:00, 12:00, and 18:00 server time and stays on the map for 3 hours. You can attack it up to 5 times per day, and you need HQ level 8 or higher to participate.

Getting that matchup right is the single biggest lever you have for pushing up the rankings and hitting higher goal reward tiers. The good news is the event runs every day Monday through Saturday, so there's always another shot to optimize. If you're also looking to push your hero development faster and keep your resources stocked without overpaying, LootBar is where I handle all my Last War top-ups. Consistently better rates than the in-game store and it's been solid every season. 

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Boss Schedule and Type Weaknesses

Each of the three Code bosses appears on specific days of the week. Matching the right troop type to the right boss gives your heroes a significant damage bonus, which directly affects both your goal reward tier and your ranking position.

• Code 87
  Weakness: Tank Heroes
  Tank squads deal bonus damage to Code 87. This is also Mason's native class, making him especially effective on these days.
• Code 64
  Weakness: Missile Vehicle Heroes
  Missile squads deal bonus damage to Code 64. Pair your best Missile heroes and swap in Mason if your Missile roster is still developing.
• Code 39
  Weakness: Aircraft Heroes
  Aircraft squads deal bonus damage to Code 39. DVA and Tesla are your primary carries on these days. Mason can still support if your Aircraft roster is thin.

Sunday is the one day of the week with no Wanted Boss. Use that time to prepare your squads, check your Mason investment, and scout the leaderboard for the week ahead.

Best Squad Builds for Each Boss

Because you can't rally, your entire damage output comes from one squad of up to 5 heroes plus their vehicles. The general principle is the same for all three bosses: lead with the type that matches the weakness, drop your defensive heroes in favor of higher-damage options, and slot Mason into any remaining position since his Zombie Purge passive gives a massive PvE damage bonus.

Code 39 (Aircraft)

Marshall · Kimberly (front) / DVA · Morrison · Schuyler (back)

• Marshall — mandatory frontline. No Marshall means no buffs, no real damage output
• Kimberly — stays frontline for durability
• DVA — gives her the best Attack gear first. Primary damage dealer for this boss
• Morrison — gear her after DVA, second damage dealer
• Schuyler — third in gear priority. Swap Schuyler and Kimberly positions if needed based on your roster

If Schuyler or Morrison are unavailable or weak, Stetmann and Mason are solid substitutes for the back row. In Season 4, you can replace Marshall with UR Sarah if you have her available. For gear, equip your best Cannon, Railgun, and Data Chip on every deployed hero.

Code 64 (Missile)

Swift · Tesla (front) / Adam · Fiona · Marshall (back)

• Swift — DoT damage stacks consistently against boss HP pools
• Tesla — top row, high damage output for Missile
• Fiona — radiation damage adds sustained pressure throughout the fight
• Adam — support and additional Missile damage
• Marshall — mandatory in every boss squad. His buffs are non-negotiable for real damage output

If you don't have a Missile squad yet, use your top 4 damage dealers — DVA, Kimberly, Stetmann, Mason, or Schuyler— with Marshall as the mandatory fifth slot. If Adam falls behind in performance, swap him out for Kimberly instead. On Season 3 Day 39, after unlocking McGregor's Exclusive Weapon, use McGregor instead of Marshall. For gear, equip your best Cannon, Railgun, and Data Chip on every deployed hero.

Code 87 (Tank)

Marshall · Tesla (front) / Kimberly · Stetmann · Mason (back)

• Marshall — must have full defense gear. Mandatory in every formation
• Tesla — If Tesla falls behind, use DVA instead
• Kimberly — Cannons go to Kimberly first. Primary Tank damage dealer
• Stetmann — gear after Kimberly, strong Awakened Skill damage
• Mason — Boosts back-row tank heroes' damage via Zombie Purge passive. Push his Zombie Cleaner skill to level 20 for maximum output

Equip your best Cannon, Railgun, and Data Chip on deployed heroes

Mason: The Boss Killer Most Players Overlook

Mason is an SSR hero that most players bench the moment they build their first UR squad. In PvP, he doesn't compete with top-tier UR heroes in player-vs-player combat. But Wanted Bosses are PvE, and PvE is where Mason completely changes the math.

His passive skill, Zombie Purge (also called Zombie Cleaner), specifically boosts back-row tank heroes' damage, making him most effective in the Code 87 formation where he sits in the back row alongside Kimberly and Stetmann. Push his Zombie Cleaner skill to level 20 for maximum output. At that level, his contribution to the squad's total damage is significant enough to treat him as a core slot rather than a filler pick.

The other non-negotiable across all three bosses is Marshall. Every single squad formation requires Marshall, no exceptions. His buff skills are what unlock your other heroes' real damage ceiling. Running any boss squad without Marshall is leaving massive damage on the table regardless of how strong your other four heroes are. The only exception is Code 64 on Season 3 Day 39 after unlocking McGregor's Exclusive Weapon, where McGregor replaces Marshall.

For gear across all three bosses: equip your best Cannon, Railgun, and Data Chip on every deployed hero. If you're spending on heroes and want your Gold Bricks to go further, LootBar is the most cost-effective top-up option I've found for Last War. Worth checking before you buy in-game.

How to Maximize Your Damage Score

Beyond squad composition, a few external buffs and habits can push your single-attack damage number significantly higher. Only your highest damage from a single attack counts toward the ranking, so these matter most for your first or second attack of the day when your buffs are fresh.

Activate War Fever Before Every Attack

War Fever is a buff that gives your heroes +1% Attack. To activate it, send a Scout march to any abandoned base on the map right before you attack the boss. The scout just needs to be sent, it doesn't need to arrive. The buff activates immediately and stays active for a short window. It sounds tiny but it stacks on top of everything else and costs you nothing except 30 seconds of prep time.

Use the Enchanted Fungus Skin

If you have the Enchanted Fungus (Mushroom) base skin equipped, it gives a passive damage bonus against all neutral creatures including Code bosses. This applies automatically as long as the skin is active on your base. It's one of the few base skins that has a functional gameplay effect rather than just being cosmetic.

Timing Your Attacks

The boss window is 3 hours. You have 5 attacks per spawn. There's no penalty for waiting until your buffs are activated before attacking, so never rush your first attack without at least triggering War Fever first. If you're pushing for a top ranking spot, save your highest-buff attack for when Mason is fully geared and all external buffs are stacked.

Rewards: What You're Actually Playing For

The Wanted Boss event has three separate reward tracks running simultaneously.

Individual Rewards

You earn individual rewards for the first three attacks on the boss each day. These are guaranteed regardless of your ranking or damage output; just show up and attack three times and you collect them. Resources, hero shards, and speedups are the typical individual reward pool.

Goal Rewards

Goal rewards unlock when you deal a specific amount of damage in a single attack. The tiers progress throughout the event window and each goal can only be claimed once per event. This is the reward track most players should focus on optimizing, hitting higher goal tiers gives substantially better resources than grinding the individual reward alone. Mason's Zombie Purge passive is the main reason players can push into higher goal tiers without massive power investment.

Ranking Rewards

Rankings are based on the highest single-attack damage you deal across the entire event day. Only your best attack counts, not your total damage across all 5 attacks. The gap between Top 1 and Top 100 in ranking rewards is relatively small compared to other events, which means you don't need to be the absolute strongest player on your server to get meaningful rewards from the ranking track. Consistent mid-ranking performance across all six boss days adds up to a significant weekly resource income.

Conclusion

The Wanted Boss event rewards players who show up with the right squad more than it rewards raw power. Matching the type weakness — Tank for Code 87, Missile for Code 64, Aircraft for Code 39 — is the baseline. Adding Mason with Attack gear and War Fever active on top of that is what separates average goal tier rewards from hitting the high tiers consistently. 

The three reward tracks give you individual rewards just for participating, goal rewards for dealing enough damage in one attack, and ranking rewards for your peak single-attack performance. Run it every day Monday through Saturday and the cumulative weekly reward income adds up significantly over a season. For keeping your hero roster developed and your resources stocked, LootBar is consistently the best-value option I've found for Last War Top Up. Better rates, fast delivery, works directly in-game.