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Last Asylum: Plague Research Priority Guide for Competitive Players
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For Last Asylum: Plague Doctors already investing at competitive levels who want to know which research tree to run right now, how to use Study Scrolls without wasting them, and why the Alliance Caravan tree is worth more than it looks.
Research in Last Asylum: Plague is irreversible. Sequence matters.
Thirteen research trees. One Research Lab. Every day spent in the wrong tree is a day of compounding you cannot recover. Research is one of the few systems in Last Asylum: Plague where the order you invest in things matters as much as the volume of investment behind them.
Most accounts that feel like they are falling behind at competitive spending levels have the same underlying problem: they followed the quest system into whichever tree looked relevant at the time, and the trees that produce the most compounding (Development above everything else) sat idle or ran last instead of first.
This guide covers the exact tree priority order, why Development runs before anything else without exception, what Study Scrolls actually do and when to use them, the Research Lab level gates that unlock critical trees, the Alliance Caravan tree and why it matters more than most guides acknowledge, and the alliance research coordination that multiplies individual investment.
Last Asylum: Plague research priority order that produces the fastest competitive progress
1. Development: run this first, without exception
Development is where the compounding starts. Its bonuses apply to every research project, every building upgrade, and every troop training cycle you will ever run after it. Faster construction means buildings upgrade sooner. Higher research speed means every future timer, including the long ones, finishes earlier. More training throughput means the troop base that feeds every combat event scales faster.
The three Development nodes to unlock as fast as possible, in order: Training Grounds unlock first (directly limits how quickly the troop base that everything else depends on can be built), Construction Master second (each node removes 5% from building construction time, compounding across every remaining upgrade in the account's lifetime), Research Upgrade third (reduces the time cost of every subsequent research node, including the expensive ones later).
Do not move to any other tree until these three Development nodes are live.
2. Economy: run alongside Development in the second Lab queue
Economy delivers resource production increases, gathering buffs, and the Herb Garden unlock that is the single most impactful early node in the game for accounts that are hitting herb shortages. The resource management guide covers why herb scarcity is almost always an Economy research problem rather than a production building problem.
Economy is badge-free and competes only with Development for the second queue slot. Run both simultaneously once the second Research Lab is available. Never let either queue sit idle.
3. Alliance Duel: first badge-spending tree, unlocks at Lab Level 15
The Alliance Duel research tree unlocks the moment the Research Lab reaches Level 15. The moment that happens, this tree moves to the top of the queue. Within the Alliance Duel tree, the Tier 4 through Tier 6 Reward Unlock nodes are the first targets. These permanently expand the reward boxes from every Alliance Duel event, opening access to higher-tier boxes with better resources, speedups, and materials. Every Alliance Duel event run without these nodes unlocked is a permanently missed reward tier.
Research Lab Level 15 is the hard gate. Pushing the Lab to 15 is a prerequisite action for any alliance that wants to compete in Alliance Duel at the reward tier level that serious spenders are accessing. Make Lab 15 a named milestone target alongside Sanctuary upgrade priorities.
4. Hero faction trees: match your active Squad 1 formation
Each hero faction (Warrior, Ranger, Warlock, Tank) has its own research tree. The tree that matches your Squad 1 formation is the correct next priority after Alliance Duel has its Tier 4 through Tier 6 reward nodes unlocked. If Arthur and Marlena anchor your primary squad, the Warrior and Tank faction trees are the targets in that order.
Do not spread investment across multiple faction trees simultaneously before the primary formation's tree is fully developed. The compounding logic is the same as hero investment: concentration before expansion.
5. Soldiers and Elite Troop: troop power and T10 unlock
Soldiers delivers troop attack, defense, and HP boosts that apply to every combat engagement. Elite Troop is the hard gate for T10 troops, the endgame troop tier that represents a step-change in combat power. Both require Lab level progression and badge investment.
The sequencing principle: Soldiers runs in parallel with Alliance Duel badge investment once the immediate Alliance Duel reward tier nodes are secured. Elite Troop is pushed when T10 becomes the active progression target, which for most accounts happens after Sanctuary Level 20 and after the core hero formation is established at competitive star levels.
6. Caravan Transport: worth more than it looks
The Caravan Transport research tree is one of the most underrated trees in Last Asylum: Plague for competitive alliance leaders. It improves caravan speed, protection, and reward yield for Alliance Caravan deployments.
Alliance Caravans are a major event scoring vehicle across multiple event types, including Alliance Duel where a UR Caravan scores 210,000 base points per activation (higher with Caravan Transport research). This is the highest single-action point output available in Alliance Duel. For alliances that coordinate Caravan deployment on high-value event days, Caravan Transport research multiplies the output of every deployment the alliance runs for the rest of the account's life.
The mistake most accounts make with this tree is treating it as optional late-game content. The compounding return on Caravan Transport research starts the moment Alliance Caravans become a regular part of event strategy. Push it after the Alliance Duel reward tier nodes and the primary hero faction tree, but not as an afterthought.
7. Offensive and Defensive Tactics: late-game combat compound
Both trees deliver meaningful combat bonuses for attacking and defending. Both are locked behind Research Lab level requirements and only unlock at mid-to-late game stages. Work on them as Lab level allows, after the higher-priority trees are progressed. They are not early targets and should not displace Development, Economy, or Alliance Duel at any stage.
How to use Study Scrolls in Last Asylum: Plague
Study Scrolls are the primary research acceleration item in Last Asylum: Plague. They differ from standard speed-up items in how they are acquired and when they produce the most value.
What Study Scrolls do: when used, a Study Scroll reduces the active research timer. Higher-grade scrolls reduce more time per use. They function identically to research speed-up items but are named differently in the Last Asylum system.
How to get Study Scrolls: Study Scrolls come from Alliance Duel event rewards (the reward boxes that the Tier 4 through 6 Reward Unlock research nodes expand), daily activity chests, event milestone rewards, and specific pack purchases. The Alliance Duel research investment that unlocks higher reward tiers directly increases Study Scroll income on an ongoing basis. This is the compounding return on Alliance Duel research that most guides understate: it funds its own acceleration.
When to use Study Scrolls: the highest-return timing is during Alliance Duel Research Day (the tech-focused phase) when research completions score both event points and research output simultaneously. A Study Scroll used to complete a research node during Alliance Duel Research Day produces the node completion plus Alliance Duel scoring from the same action. The same scroll used between events produces only the node completion.
What not to do with Study Scrolls: the most common mistake is using Study Scrolls on Development or Economy nodes that would have completed naturally overnight, because those trees have short timers that do not need acceleration. Study Scrolls produce the most value on long-timer nodes in Alliance Duel, Hero faction, or Soldiers trees where the time saved is measured in days rather than minutes.
Research Lab upgrade priority
The Research Lab is the building that determines which research trees and which nodes within trees are accessible. Lab level gates apply at multiple points across the research priority order.
Lab Level 7: unlocks the Research Lab itself and initial tree access. Early priority alongside Sanctuary foundation upgrades.
Lab Level 10: opens the first tier of mid-game research nodes across multiple trees. A prerequisite for meaningful progress in Hero faction trees.
Lab Level 15: unlocks the Alliance Duel research tree entirely. This is the most important Lab milestone for competitive alliance play. Push Lab to 15 before any other non-priority Lab investment. An alliance where members are running Alliance Duel events without Lab 15 is missing the reward tier nodes that make the event worth participating in at a competitive level.
Lab Level 20 and above: opens Offensive and Defensive Tactics trees and higher-tier nodes across Soldiers and Elite Troop. Late-game targets that follow Lab 15 naturally through continued progression.
The second Research Lab is the most impactful single infrastructure investment in Last Asylum: Plague after the Sanctuary foundation is established. Two queues running simultaneously means Development and Economy can run in parallel with badge-heavy trees rather than competing for the same slot. The return compounds from the day the second Lab is active.
Alliance research and coordinated investment
Alliance research is a separate system from individual research. By donating resources to Alliance research, your alliance builds collective passive stat bonuses that apply to every member. These bonuses compound across every engagement type, including Elixir Scramble, Hunt Battle, and Alliance Duel combat phases.
An alliance with fully developed collective research operates at a measurably higher stat level than an alliance with equivalent individual accounts but underdeveloped collective research. This is the invisible multiplier that power score comparisons miss: two accounts at identical power scores perform differently when one is in a max-research alliance and one is not.
For R5s managing alliance research: coordinate member donations around the specific trees that produce the highest collective return for your current event schedule. Combat research nodes are the highest priority before Elixir Scramble and Kingdom War. Resource and construction nodes compound most during development pushes between events.
How to make your Last Asylum: Plague research investment compound correctly...
The research sequencing above determines how efficiently your investment converts into permanent account-wide compounding. There is a second variable most accounts leave unexamined: how efficiently your spend converts into Diamonds.
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Last Asylum: Plague research guide FAQs
Why is my alliance losing Alliance Duel to alliances with lower overall power?
Almost always a Research Lab Level 15 problem on your roster combined with underdeveloped Alliance Duel research trees. Without Lab 15, the Alliance Duel reward tier nodes that open access to higher-scoring boxes are unavailable. Without the Tier 4 through 6 reward nodes researched, every event produces lower-tier reward boxes regardless of how well the alliance coordinates. Audit how many roster members have hit Lab 15 before diagnosing other causes.
How do Study Scrolls work in Last Asylum: Plague and when should I use them?
Study Scrolls reduce the active research timer when used, similar to standard research speed-up items. The highest-return timing is during Alliance Duel Research Day, where using a Study Scroll to complete a research node scores both the research completion and Alliance Duel event points simultaneously. Avoid using them on Development or Economy nodes with short natural timers. Save them for long-timer nodes in Alliance Duel, Hero faction, and Soldiers trees where the time saved is measured in days.
Is the Alliance Caravan research tree actually worth pushing?
Yes, significantly for competitive alliances. Alliance Caravans score 210,000 base points in Alliance Duel per UR Caravan activation, the highest single-action scoring move available. Caravan Transport research increases that output and improves yield across all Caravan deployments. Alliances that coordinate Caravan deployment on high-value event days and have Caravan Transport research developed generate substantially more Alliance Duel points from the same number of deployments than alliances without it.
What level does the Research Lab need to be for Alliance Duel research in Last Asylum?
Research Lab Level 15 is the hard gate for the Alliance Duel research tree. Until the Lab reaches 15, the Alliance Duel tree is locked entirely regardless of other prerequisites. Push Lab to 15 as a named milestone target alongside Sanctuary upgrade priorities. An account or alliance running Alliance Duel events without Lab 15 is missing the reward tier nodes permanently for every event run before that milestone is reached.
Should I run multiple research trees simultaneously or focus on one?
Focus on the highest-priority tree in each active Lab queue. With one Lab: Development first until the three core nodes are live, then Alliance Duel at Lab 15. With two Labs: Development and Economy run in parallel in separate queues, with Alliance Duel and the primary Hero faction tree rotating through the second queue timed to event windows. Never leave either queue idle. Never split badge investment across two badge-heavy trees simultaneously before one reaches its milestone threshold.
What is the fastest research setup for a new competitive alliance in Last Asylum: Plague?
Every member pushes Development first: Training Grounds unlock, Construction Master nodes, Research Upgrade nodes. Every member pushes Research Lab to Level 15 as a milestone alongside Sanctuary progression. Once Lab 15 is reached, Alliance Duel Tier 4 through 6 reward nodes unlock and become the immediate queue priority. Study Scrolls are saved for Alliance Duel Research Day to double-score completions. Second Research Lab is purchased and activated as early as the spending budget allows.
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