The Fastest Way to Increase Power in Last Asylum: Plague (Complete Guide)

Power growth in Last Asylum: Plague comes from five distinct sources — buildings, technology, heroes, troops, and ravens. Most players focus on just one or two and wonder why they're getting outpaced. This guide breaks down every source of power, what it actually does for you in battle, and the exact priority order for the fastest possible growth.

Understanding the 5 Power Sources

Before diving into each area, it helps to know the game's own power breakdown. In the game, your total power comes from:

One critical distinction the guide makes: building power mostly inflates your visible score — it does not make you stronger in actual combat. The exceptions are the Sanctuary, Statues (Warrior/Ranger/Warlock), and a few specific buildings. Real battle power comes from research, heroes, and troops.

1. Buildings — The Foundation of Everything

Why the Sanctuary Is Your #1 Priority

The Sanctuary (your headquarters) gates literally everything else in the game:

• All other buildings are capped at your Sanctuary level — you cannot upgrade any other building above your Sanctuary's current level
• Sanctuary Level 27 → unlocks Tier 9 troops
• Sanctuary Level 30 → required to unlock Tier 10 troops (with elite troop research)
• Sanctuary level controls your hero level cap — at Level 23, your heroes are capped at level 115; you must upgrade Sanctuary to push past 120
• Research Lab levels are gated by Sanctuary — deeper research requires higher Research Lab levels, which require a higher Sanctuary

Sanctuary Level 30 gives you 384,000 might from that one building alone.

Even your resource buildings contribute: a Level 30 resource building adds 115k might; Level 22 adds 30k. Every building matters, but Sanctuary always comes first.

Survivors — the Hidden Building Booster

Inside each building you'll find a Deploy button for Survivors. These are assignable workers that boost the building's output:

• Survivors deployed to resource buildings → increase wood, grain, or herb output
• Survivors deployed to training buildings → increase troop training capacity
• Higher quality (colour tier) survivors give much larger bonuses

To recruit Survivors, go to Obtain Hero → Survivor Recruitment. Upgrade survivors further for compounding production gains.

Which Buildings Give Real Battle Power?

2. Technology — Your Biggest Real Battle Power Source

Research is where your actual combat strength comes from. After filling your visible power score with buildings, technology is what makes you genuinely harder to kill and stronger in fights.

Research Priority Order

Step 1: Full Development + Prosperous Economy Complete these two research tracks first. They boost resource production and construction speed — everything you need to progress faster.

Step 2: Alliance Duel Research (CRITICAL for F2P)

This is the most important advice in the guide: max your Alliance Duel research before anything else if you're using Study Scrolls.

Here's why it matters so much:

• Grants +50% extra points in Alliance Duel events
• Unlocks chest tiers 4–6 and 7–9 (without this research you physically cannot claim these chests)
• Chest rewards include:
  • UR Hero Omni shards and UR Epigraphs (SS tier)
  • Study Scrolls — which you need for T10 research
  • Up to 10,000 Diamonds from Tactical Supply chests
  • Level 11 Gear fragments
  • Occasional UR Hero Shards

This creates a compounding loop: Alliance Duel research → more event points → more Study Scrolls → faster T10 unlock → more battle power.

Step 3: Elite Troop Research (for T10)

To unlock Tier 10 troops you need:

1. Sanctuary Level 30
2. Elite Troop research completed

This research requires a large number of Study Scrolls — which is exactly why Alliance Duel research comes first (it generates the scrolls you need).

Note: Tech might (the power from research) increases your visible score, but your actual battle stats only come from completing the combat research branches fully.

3. Heroes — The Largest Power Contributor

At high levels, heroes contribute 9 million+ power — more than any other single source. There are four ways to grow your hero power:

3a. Hero Level

Simply leveling up heroes gives significant power gains. However, your hero level cap is tied to your Sanctuary level. If you're stuck at level 115, upgrade your Sanctuary first.

3b. Hero Stars (Most Impactful)

Each star upgrade dramatically increases a hero's stats:

• Maximum stars: 10
• At 8 stars: all skills are unlocked (though not at max level)
• Stars also unlock higher skill tiers — a hero at 6 stars cannot access the same skill ceiling as one at 8 stars
• Star upgrades require Promotion materials (Epic/UR fragments)

Prioritise star upgrades on your main formation heroes before anything else.

3c. Hero Skills

Every skill level directly increases combat stats and ability damage. Maxing skills requires Skill Books — invest these on your core 5 heroes first, not on secondary heroes.

3d. Hero Level Cap Is Gated by Sanctuary

If you see a message saying "Promote hero to increase their skill capacity" — that's telling you your Sanctuary needs to be higher. This is another reason Sanctuary is always the first upgrade to make.

4. Gear — High Power With a Catch

Gear Power Numbers (Estimated)

With 10+ gear pieces equipped across a hero, a fully geared hero at Level 20 equipment provides 800,000+ power from gear alone.

Gear Workshop Unlock

To promote gear beyond its base level, you need your Gear Workshop at Level 20. This unlocks the Promote function, which gives a large jump in both stats and power.

Recommendation: Prioritise forging and equipping gear to Level 10, then push to Level 20 once your Gear Workshop hits Level 20.

The "Fake Power" Strategy

Equip gear on your secondary formation heroes (heroes not in your main squad) as well. Here's why:

1. The game counts all equipped gear toward your total power score
2. Opponents see your total power before deciding whether to attack
3. A higher visible power number makes enemies hesitate — even if most of that power is from secondary heroes
4. If your primary formation loses, your secondary formation can still deal real damage

This isn't deceptive — it's smart resource deployment. Gear on secondary heroes also genuinely improves your defence when your main squad falls.

Curio Items

Curios are minor power contributors (~830k power for some) but hard to obtain for F2P players. Don't prioritise them early — focus on gear and star upgrades first.

5. Troops — Train Constantly, Train Smart

After heroes, soldiers (troops) are your second largest real power source — and unlike heroes they contribute directly to battle survivability and DPS.

Training Ground Strategy

Here's the specific recommendation from the video:

• Keep 3 Training Grounds at Level 20 — enough to maintain good training volume
• Push 1 Training Ground all the way to Level 30 first
• Once your main buildings are upgraded, come back and push the other three to 30

This approach saves resources and speed-ups during the critical mid-game stretch while maintaining solid troop output.

Train as many high-tier troops as your Sanctuary and research allow. T9 unlocks at Sanctuary 27; T10 requires Sanctuary 30 + elite troop research.

6. Events — Never Miss Free Power

Events are where F2P players close the gap. Missing them is leaving power on the table.

Priority Events to Complete Every Cycle

Complete at least 3 special events per cycle to unlock all chest tiers in those events. Missing the threshold means leaving top-tier rewards unclaimed.

Also follow the official Last Asylum: Plague social accounts — they regularly release bonus codes and early event rewards through their channels.

7. Ravens — Late Game Power Multiplier

Ravens are a passive power system that unlocks as you start game, but after approximately 80 days of gameplay, you get Epigraph Plan feature. You cannot rush these — the game simply won't show them until you've hit the day threshold.

When they do unlock, Ravens boost:

• Hero damage dealt
• Hero HP
• Hero attack and defence
• Raven's own attack, defence, and HP

This is described as a "game-changer" feature. There will be separate detailed guides covering Ravens and Epigraph systems — they deserve their own deep dives.

The Fastest Growth Priority Order

If you're F2P or a small spender, follow this exact priority:

1. Sanctuary — always first, always the bottleneck
2. Alliance Duel research — max this before spending Study Scrolls elsewhere
3. Elite Troop research — to unlock T10 troops (requires lots of scrolls from step 2)
4. Hero stars, skills, and levels — your biggest real battle power source
5. Hero gear — equip all heroes including secondary formation
6. Troop training — train constantly at the highest tier available
7. Every event — never skip Alliance Duel or daily events
8. Raven Nest / Epigraph Plan — comes naturally after ~80 days; don't skip when it arrives

Summary: Power That Matters vs. Power That Looks Good

Focus your resources on the right column. Buildings will come naturally as you upgrade — never delay a Sanctuary upgrade to finish resource buildings first.

Watch the original video on YouTube for the full visual walkthrough.