Stamina & Resource ROI

Last War: Survival — Where to spend stamina for maximum return. Tier list, decision tool, income calculator.

Should I spend stamina right now?

⚡ Live ROI Calculator — toggle your current situation
Zombie Invasion is currently active
Arms Race — Drone Boost phase is active now
Today's Alliance Duel day
D-Tier ROI
Hold Off — Save for Events
No major event is active. Spending stamina now earns minimal return. Stay under 120 for passive regen but hold stamina items for the next event window.

Stamina ROI tier list

Where every stamina point gives the most return — ranked by community consensus.

S
Zombie Invasion — Regular Zombie Attack 10 stamina
10 stamina → 10 Courage Medals + resources every kill. Medals exchange for hero shards, weapon shards, drone parts, and more stamina — a self-compounding loop. Best regular event in the game. Save 1,000–2,000+ stamina for this.
Arms Race — Drone Boost Phase 0 + Battle Data
Every stamina point spent AND every 10 Battle Data used in the Drone Center both earn Arms Race event points during the 4-hour Drone Boost window. The phase rotates daily — check your Arms Race tab for timing.
Triple-Dip Window rare overlap
When Zombie Invasion, Arms Race Drone Boost, and Alliance Duel Day 1 or Day 6 all align simultaneously — this is the single highest ROI moment in the game. Every stamina point earns Courage Medals, Arms Race points, AND Duel points at once.
A
Alliance Duel — Saturday (Enemy Buster) 4 pts/day
Worth 4 Duel points vs. 1–2 for other days. Kills against your VS opponent yield 5× more points than other targets. Coordinate attacks with your alliance. Dump remaining speedups and complete secret tasks here too.
Alliance Duel — Monday (Radar Training) 1 pt/day
Claim all radar rewards you stacked on Sunday, spend stamina on missions and attacks. Also the best day for Drone Parts, Battle Data, and chip chests. Often overlaps with Arms Race Drone Boost phase.
Zombie Invasion — Boss Rally (Join) 0 stamina to join
Joining someone else's Zombie Invasion boss rally costs zero stamina and yields roughly half the boss rewards. The best stamina-per-reward ratio in the game. If your alliance has active organizers, you can farm medals almost for free.
B
Daily Combat Radar Missions (skull icon) 10–20 stamina
Rebel base attacks, elite kills, and Doom Walker missions drop Hero EXP books. Legendary (orange) and purple difficulty missions give the best rewards. Free radar mission types (treasure, survivor, drone parts) cost zero — always complete those first.
Spec Ops / Honorable Campaign stamina
Best early-game hero EXP per stamina before Stage 30. Golden EXP medals from Honorable Campaign can instantly level a hero. Value drops once you have strong passive EXP sources (arena, training base).
Alliance Duel — Wednesday/Friday 2 pts/day
Wednesday (Age of Science) and Friday (Total Mobilization) both reward moderate stamina use via radar missions and combat tasks. Not peak value but worth spending if you're near a chest threshold.
C
Capital War / Server Wars varies
PvP combat events require heavy stamina investment. ROI depends heavily on your server's competitive balance and alliance coordination. High floor for top alliances, marginal for mid-tier.
Alliance Duel — Tuesday/Thursday (non-stamina days) save stamina
Tuesday (Base Expansion) and Thursday (Train Heroes) are speedup/resource days. Stamina use doesn't directly drive their point categories. Save stamina for Saturday or the next Zombie Invasion window.
D
Random zombie kills outside events 10 stamina
Kills zombies without Zombie Invasion event multipliers. No Courage Medal income, no event point bonus. Strictly inferior to waiting. Only acceptable if your stamina is about to cap and no event is imminent.
F
Stamina bar purchase (diamond refill) 1,000+ 💎 / 100 stamina
10 diamonds per stamina point on the first purchase — 8× worse than the VIP store (1.2 diamonds/stamina). Escalates with each purchase in the same day. Never buy this unless it's a genuine emergency during a triple-dip event window.

Stamina income calculator

📊 How much stamina do you actually earn per week?
424
Avg daily stamina
2,966
Weekly total
0
Weekly wasted (capped)
300 💎
Weekly VIP cost

The cap trap

Passive regen stops the moment you hit 120 stamina. Going to sleep with your bar at 20 means waking up 8 hours later at exactly 116 — perfect. Going to sleep at 130 means waking up at 130 — 96 stamina regen completely lost.

Cost comparison — stamina sources

SourceAmountCost💎 per staminaVerdict
Passive regen (always under 120)288/dayFreeFreeAlways take
Free daily claims (2×)100/dayFree (2 logins)FreeAlways take
VIP Store (weekly, Monday)250/week300 💎1.2 💎#1 priority buy
Zombie Invasion event storevariesCourage MedalsFree (medals)Buy first in store
Stamina bar — 1st purchase1001,000 💎10 💎Avoid
Stamina bar — 2nd+ purchase100Escalating10+ 💎Never

Weekly spending calendar

Alliance Duel runs Monday–Saturday. This is your default weekly stamina rhythm.

Sun
Prep
Stack radar missions. Don't claim yet.
Mon
Spend
Claim stacked radars. Dump stamina + Battle Data + Drone Parts.
Tue
Save
Building speedup day. Stack radar missions.
Wed
Mix
Claim stacked radars. Spend Valor Badges. Moderate stamina.
Thu
Save
Hero XP/shards day. Stack radar missions.
Fri
Prep
Claim stacked radars. Train troops. Shield up before sleep!
Sat
Spend
4-point day. Enemy kills. Dump ALL remaining resources.

Override this calendar during Zombie Invasion

When Zombie Invasion is active (every ~2 weeks), it trumps the Duel calendar for stamina. Spend aggressively on zombies regardless of what Duel day it is — Courage Medals have far more long-term value than standard Duel point sources.

Battle Data — timing guide

What Battle Data does

Battle Data is used in the Drone Center → Data Training (10 per use). Each use levels your Tactical Drone, providing passive combat bonuses to all squads. Unlike stamina, Battle Data has no regen — you spend it when you have it.

When to use Battle Data

Best time: During Arms Race Drone Boost phase — each 10 Battle Data spent earns Arms Race event points. Second best: Alliance Duel Day 1 (Monday, Radar Training) — the day specifically rewards drone activity. Outside these windows, using Battle Data is fine but earns no bonus points.

Where to get Battle Data

Purple and orange (legendary) difficulty radar missions. Defeating Doom Elites on the world map. Exchanging campaign points. Special events. Do not hoard excessively — use it on the correct days rather than letting it sit.

Don't train past a checkpoint without Drone Parts

Every 5 drone levels hits a checkpoint requiring Drone Parts (scarce at higher levels). If you're approaching a checkpoint and don't have Parts, hold your Battle Data. Burning through Data to hit a checkpoint you can't pass wastes everything.

Quick rules

01

Stay under 120 — always

Passive regen stops at 120. Wasting regen is equivalent to throwing away the VIP store purchase you paid for.

02

VIP store stamina — every Monday

250 stamina for 300 diamonds. 8× better value than the stamina bar. This is the first thing you buy from the store each week, no exceptions.

03

Never spend stamina bar diamonds (usually)

10 diamonds per stamina. Only acceptable if Zombie Invasion is active AND it's your last chance to hit a critical Courage Medal threshold.

04

Rally join = free medals

Joining a Zombie Invasion boss rally costs 0 stamina and nets ~half the rewards. Your alliance's most efficient stamina action.

05

Free radar missions are always free

Treasure digs, survivor rescues, drone parts collection — zero stamina. Complete every free radar mission type every day regardless of what events are active.

06

Battle Data waits for Arms Race

Using Battle Data outside Arms Race Drone Boost phase means leaving event points on the table. Hold it until the window opens.