Last War Season 1 Week 4 Guide: Mastering Builder Alliances and Cross-Server Wars

Week 4 can feel chaotic because several objectives overlap, but the overall rhythm is predictable once you break it down. Day 1 opens the Builder Alliance transformation window. The first few days are spent preparing for War Declaration objectives, and by Wednesday the first major cross-server pressure wave begins.

Infinite Octagon rankings also start to matter midweek, and Saturday becomes the second decisive war day for final city captures. If your alliance does not enter Week 4 with a synchronized schedule, it is easy to waste declarations, miss construction progress, or underperform in the tournament.

Starting in Week 4, and remaining available through Week 7, alliance leadership can choose to transform into a Builder Alliance. This is a permanent choice for the rest of the season, so it should never be made casually.

The tradeoff is simple but important. You give up your place in the Influence Rankings race in exchange for the ability to develop captured cities with support facilities that provide major alliance-wide buffs. In other words, you stop being the direct attacker and become the support backbone of the Warzone.

If your alliance goes Builder, city development becomes the new priority. Members need to donate materials earned from Daily Tasks and Radar to push facility construction from 0% to 100%. A passive alliance will waste the Builder path completely.

War Declaration is where Last War cross-server strategy fully matures. Captures are strictly limited to Wednesdays and Saturdays, with up to 2 cities per day and a maximum of 4 in other War Zones, so every declaration matters.

The strongest city-take strategy is not subtle. First, surround the target city with tightly positioned hives before the timer begins. Then let your 5 to 10 strongest players launch one overwhelming rally to crack the initial city defense. Once the city is open, the rest of the alliance should switch to solo attacks using T1 squads.

This works because the real goal is city durability damage, not expensive troop trades. T1 units are fast, cheap, and efficient for spam hits. Engineers become extremely valuable here because Siege Mastery 5/5 adds +500 durability damage per attack, and Siege Banners can accelerate the process even further.

Objective 02 introduces the Infinite Octagon, a brutal tournament fought between 8 War Zones. This is one of the clearest examples of Season 1 rewarding total War Zone coordination rather than isolated account power.

The collective goal is straightforward: your War Zone needs to eliminate 1,000,000 enemy units. The reward scaling is huge, especially for eligible alliances that maintain over 1,000,000 Influence Points. Winning tournament rounds creates some of the biggest influence spikes available in this phase of the season.

To get maximum value out of Week 4, your alliance must commit to two priorities at the same time. If you chose the Builder route, members need to keep donating to city facilities. If you remain war-focused, your attacks need to be perfectly synced around Wednesday and Saturday declaration windows.

If you are an Engineer, your role in city durability damage can be the deciding factor between a clean capture and a wasted war window. Keep T1 squads ready, track siege timers carefully, and use Week 4 to set up long-term control rather than chasing random fights.