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Infinity Kingdom Research Priority Guide for High Spenders
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Infinity Kingdom research is the only progression system that does not reset. Buildings hit seasonal level caps and wait for the next season. Immortal stars are constrained by fragment availability and event timing. But Academy research runs continuously, compounds permanently, and creates power advantages that show up in combat outcomes rather than power scores.
This Infinity Kingdom guide covers research priority for accounts spending seriously: which technology tree to unlock first, how to sequence Military, Development, Dragon, and Conquest nodes for maximum PvP return, and how to keep the research queue running without gaps across a full season. If you are searching for the best Infinity Kingdom research order, which Academy nodes matter most for competitive accounts, or how Tower of Knowledge fits alongside Academy progression, this is the guide.
Two accounts at the same Castle level with the same Immortal stars fight completely differently when one has gone three months deeper into Military tech. The power score does not reflect it. The KvK rally outcome does.
Serious accounts run speedups on research before buildings. Construction queues clear on their own between research timers. Research queues that go empty do not recover that lost time within the same season.
Why Infinity Kingdom research matters more than buildings for serious accounts
Building upgrades are capped each season by Castle level limits. You hit the ceiling and wait for the next season's increase. Research has no equivalent ceiling. The tech trees are long enough that even whale accounts running continuous research do not complete them until well into Conquest.
Serious accounts use speedups on research first. Buildings get upgraded when the construction queue naturally clears between research timers.
The four Infinity Kingdom technology trees (and how to sequence them)
Military Technology
The highest-priority tree for competitive accounts. Military research unlocks troop attack bonuses, troop defense and HP bonuses, march capacity increases (more troops per march), and rally capacity increases (critical for alliance war performance).
Priority path for serious accounts: march size nodes first, then attack bonuses, then defense bonuses. A larger march carries more troops. More troops means more damage output per PvP engagement at the same power level. The attack investment also accelerates Infernal farming efficiency, which feeds gold income, which funds more research.
Defense investment becomes higher priority in Season 2 and Conquest when being rallied by coordinated enemy alliances is a real operational concern.
Development Technology
Development covers resource production, gathering speed, construction speed, and related infrastructure. For accounts with consistent monthly spending, resource production research has lower urgency than for free-to-play accounts.
Priority exception: gold production nodes. Gold is the bottleneck resource for Academy research itself. Early gold production research is self-reinforcing: it funds more research at the cost of research. Prioritize gold production nodes in Development before stone and lumber.
Construction speed nodes are useful early if the queue is the bottleneck. Accounts with a permanent builder already have two construction slots active. Deprioritize construction speed relative to Military unless actively blocked by build times.
Dragon Technology
Dragon research improves your elemental Dragon's stats, skill activation rate, and passive bonuses. This tree unlocks after your Castle reaches the required level and your Dragon is leveled enough to contribute to combat.
Priority node: Dragon Skill Activation Rate. Higher activation rate means your Dragon's element-boosting passive fires more consistently during combat. The passive bonus a Dragon provides to the formation is a percentage of troop stats. Higher activation frequency compounds across a fight.
Element-specific notes: Fire Dragon bonuses scale with active Blessings, giving Fire march passive combos additional value. Lightning Dragon bonuses scale with debuffs, giving Lightning's debuff-heavy passive strategies additional return.
Research the Dragon tech tree in parallel with Military once your Dragon is actively contributing to your main march.
Conquest Technology (Season 2+)
Conquest-specific research branches unlock after entering Season 2. New troop passive bonuses added in Conquest:
• Shieldmen: reduced damage taken from normal attacks
• Cavalry: chance to reduce enemy Physical Defense on normal attacks
• Bowmen: chance to reduce enemy Magical Defense (valuable for Empress Wu, Merlin, Himiko)
• Spearmen: HP leech from normal attacks
For Conquest-level serious accounts, cavalry and bowmen receive the most return from Conquest tech investment. Prioritize based on your march's primary troop type.
Tower of Knowledge: the passive skill layer that runs alongside Academy research
The Tower of Knowledge unlocks at Castle 12. It is a separate system from Academy research but equally important for competitive accounts. The Tower houses passive skills you assign to your Immortals that modify their combat performance across the entire formation.
Tower of Knowledge passives require Soul Crystals to upgrade. Purple crystals from Random Immortal Fragments are the primary Soul Crystal source. The Random Immortal Fragments in the Golden Path store are the best per-season source of purple crystals.
Priority passive skills by element:
Sustaining a full research queue: the resource chain serious accounts run
The research queue should never be empty. The constraints on research continuity for serious accounts:
Gold. Gold is the primary research cost resource. Infernal farming is the primary gold source. Action Points fund Infernal farming. Daily Bundles provide Action Points. Any break in this chain stalls research. Sustaining Daily Bundle AP income throughout the season is what keeps the research queue running without interruption.
Speedups. Do not hoard speedups. Use them on research. Every speedup sitting unspent is research that is not progressing. The exception: hold a reserve before KvK when active construction may be needed during the war event.
Academy level. Higher Academy levels unlock deeper tree nodes. Your Academy upgrade schedule should track with Castle level progression. Academy lagging behind Castle level creates a research depth bottleneck that speedups cannot resolve.
Infinity Kingdom research priority summary for high-spending accounts
Season 1:
1. Military: march size nodes, troop attack bonuses
2. Development: gold production nodes
3. Dragon: Skill Activation Rate node
4. Tower of Knowledge: element-specific priority passives
Season 2:
1. Military: continued attack and defense depth
2. Conquest tech: cavalry and bowmen priority nodes based on troop type
3. Tower of Knowledge: legendary skill nodes as currency becomes available
4. Castle 50+ content
Ongoing rules: never let the research queue sit empty. Spend all Action Points daily on Infernal farming. Buy Random Immortal Fragments from Golden Path every season for Tower of Knowledge crystal income.
Infinity Kingdom Research Playbook for Alliance Leaders
Alliance leaders in Infinity Kingdom do not just manage their own research queue. They manage the collective research depth of twenty to thirty accounts that need to function as a coordinated combat unit in KvK and Contention of Relics. The accounts that win server wars are not always the ones with the highest individual power scores. They are the ones where the core roster has consistent Military tech depth, matched troop types, and Tower of Knowledge passives that actually complement each other across marches.
Know your roster's research gaps before KvK opens. The most common preventable loss in competitive KvK is an anchor account that is two or three Military tech tiers behind the rest of the core roster. That account takes disproportionate losses in rally defense and limits the march capacity of every coordinated push it participates in. R5s who track which members are bottlenecked on Academy level or gold income, and who flag those gaps four to six weeks before KvK, give those accounts time to close the distance.
Coordinate Tower of Knowledge passive investment by element. A Fire march with Dragon Blessing and Chase maxed fights differently alongside a second Fire march running the same passive configuration than alongside one that has invested in mismatched passives. Alliance leaders who communicate element-specific passive priorities to their core roster produce more consistent combat output per fight than alliances where Tower of Knowledge investment is individual and uncoordinated.
Gold income is a collective bottleneck. The research chain depends on sustained Infernal farming, which depends on Action Points, which depends on Daily Bundle consistency across the roster. Alliances where the core accounts are running Daily Bundles and farming Infernals daily have deeper collective research than alliances where farming is inconsistent, even when individual gem spending is comparable. R5s who make Infernal farming a standing alliance expectation rather than an individual choice close the research gap faster than those who do not.
Conquest tech sequencing matters at the alliance level. When Season 2 opens and Conquest tech branches unlock, the accounts that prioritize cavalry and bowmen nodes based on their actual troop type produce measurably better combat outcomes in the first Conquest KvK. Alliance leaders who brief their core roster on which Conquest nodes to prioritize before Season 2 begins get faster alignment than alliances where each account makes the decision individually two weeks into the season.
The research advantage that wins Conquest is not built in Conquest. It is built in the six months before it, by accounts that never let the queue go empty and by alliance leaders who treated collective research depth as a strategic asset rather than a personal metric.
FAQs on research priority in Infinity Kingdom
What should you research first in Infinity Kingdom?
Military technology, specifically march size and troop attack nodes. March size increases the number of troops deployed per engagement, which means more damage output at the same power level. Troop attack bonuses compound into every PvP fight from Season 1 onward. These two node categories return more per speedup than anything else available in the early Academy. Gold production nodes in the Development tree are the second priority because they fund the research queue itself.
Are Tower of Knowledge skills more important than Academy research in Infinity Kingdom?
Both are required and both run simultaneously for competitive accounts. The distinction is function: Academy research builds the permanent percentage-based foundation of troop stats, march capacity, and training speed. Tower of Knowledge passives determine how those stats translate into combat outcomes. A Fire march without Dragon Blessing, Chase, and Weakness correctly trained cannot produce the damage output the Immortals are theoretically capable of, regardless of how deep the Military tech tree goes. The correct answer is not either or. It is both, running in parallel, funded by consistent Infernal farming and Golden Path crystal income every season.
What is the best Tower of Knowledge passive build for Fire in Infinity Kingdom?
The core Fire passive configuration is Dragon Blessing, Chase, Weakness, Oaken, and Misleading. Dragon Blessing scales the Fire Dragon's damage from active buffs. Weakness increases critical hit rate which feeds the Chase proc chain. Chase deals follow-up damage on critical hits, which Empress Wu's multi-hit ultimate activates repeatedly on a single cast. Oaken reduces incoming physical damage. Misleading increases dodge against physical attackers. This combination addresses both Fire's damage ceiling and its primary vulnerability in the same passive set.
How do you keep the Infinity Kingdom research queue running without gaps?
The research chain depends on gold, which comes from Infernal farming, which requires Action Points, which comes from Daily Bundles. Any break in this chain stalls the queue. Serious accounts run Daily Bundles consistently, spend all Action Points on Infernal farming daily, and direct speedups to research rather than construction. The Academy level should track with Castle level progression so deeper tree nodes remain accessible as the Military and Conquest trees expand. A research queue that goes empty in Season 1 does not recover that lost compounding within the same season.
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