Last Z Radar Task Stacking Guide: How to Maximize Rewards During Alliance Duel

In the post-apocalyptic survival strategy mobile game Last Z, Radar Tasks are one of the core ways to obtain resources, Hero Fragments, and increase combat power. Many players are used to claiming rewards immediately, but this often results in insufficient points during Alliance Duel (VS) themed days, causing them to miss out on high-value ranking rewards. This guide will systematically explain how to use the task stacking mechanic to achieve massive point bursts during Monday and Friday Duel Days.

 

Basic Rules of Radar Tasks

Before mastering stacking strategies, you must first understand the three core rules of the Radar system:

Storage Limit

The Radar building level determines the maximum number of tasks that can be stored simultaneously (such as 40 or 44). Once the task count reaches the limit, the system will stop the automatic refresh that occurs every 8 hours.

Automatic Refresh Cycle

Radar Tasks are usually replenished automatically at 00:00, 08:00, and 16:00 (server time) with 8 new tasks each cycle.

Laura’s Extra Tasks

The Hero Laura’s Radio Tasks are the only way to exceed the storage limit.

 

Core Task Stacking Strategies

The fundamental purpose of task stacking is to lock and preserve Radar rewards earned outside Duel Days, then claim them all at once during Radar-related Alliance Duel theme days for massive single-day points.

1. “Complete but Don’t Claim” Strategy

This is the most basic and commonly used stacking method.

How It Works: Send troops to complete Radar Tasks (such as defeating Infected or gathering resources), but after completion, do not tap the floating reward chest icon to claim the rewards.

Mechanic Effect: Completed but unclaimed tasks will remain on the map indefinitely until manually collected. This frees up active Radar task slots for future refreshes while also reserving the corresponding Duel points for release on a designated date.

2. Using Laura to Exceed the Limit

If you want to push even further on Duel Day, you can use Laura’s extra tasks to force the task count beyond the normal cap.

Best Timing: The day before Duel Day (Sunday or Thursday).

Step-by-Step Process:

Wait until the system auto-refreshes tasks and your Radar reaches the storage limit.

Activate Laura’s Radio Tasks.

Your total task count may display as 64/44 or even higher, greatly exceeding the normal limit.

Cost and Return:
This strategy sacrifices the next 8-hour automatic refresh cycle, but in exchange provides roughly 20 additional tasks worth of Duel points. For players aiming for higher Alliance rankings, this trade-off is extremely worthwhile.

 

Recommended Duel Day Point Maximization Schedule

To fully claim all Duel Day rewards, it is recommended to follow the schedule below strictly:

Time Period	Action	Purpose
Sunday/Thursday Evening	Stop claiming all Radar rewards and trigger Laura’s tasks	Push task reserves to the maximum limit (normal cap + Laura bonus tasks)
After Monday/Friday Reset	Once Alliance Duel begins, claim all completed task rewards at once	Instantly gain massive points and push both personal and Alliance rankings
After Claiming Rewards	Immediately clear the newly refreshed 8 tasks	Free up task slots for the next automatic refresh cycle

 

Common Mistakes and Important Notes

Even after understanding the stacking mechanics, you should still pay attention to the following details to avoid losing rewards.

Risk of Limited-Time Task Disappearance
Some special Radar Tasks (such as map excavation nodes or elite special Infected) have expiration timers and may disappear after remaining on the map for over 8 hours. It is recommended to prioritize completing these tasks first. Once they enter the “Completed but Unclaimed” state, they can be preserved indefinitely without being affected by expiration timers.

Task Quality Priority
In Alliance Duel scoring, Orange (Legendary) and Purple (Epic) tasks provide significantly more points than Blue (Rare) tasks. When storage space becomes tight, prioritize keeping high-quality tasks while clearing lower-quality Blue tasks to maximize point efficiency per slot.

HQ Level Scaling
Radar Task rewards scale with Headquarters (HQ) level. If your HQ upgrade is close to completion, you may consider delaying the collection of stacked rewards until after the HQ upgrade finishes in order to receive better rewards.

 

Conclusion

In Last Z, the Radar is not just a standard resource-production building, but also a key facility for strategic preparation during Alliance Duel events. Temporarily sacrificing immediate daily rewards in exchange for explosive Duel Day point gains is one of the most effective strategies for free-to-play and low-spending players to narrow the gap with top-tier competitors.