Ultimate Ajax Builds and How to Unlock

This is an Ultimate Ajax build for normal and hard mode in The First Descendant. Read on to learn Ultimate Ajax's best builds, how to unlock, basic info, skills, as well as Ultimate Ajax's exclusive equipment and skins!

All Ajax Guides
Ajax Builds	Ultimate Ajax Builds

Best Ultimate Ajax Build for Hard Mode

Jump to a section!
Descendant Modules						Weapons and Modules
Reactor and External Components						Playstyle Tips
▼Jump to Normal Mode Build▼

Best Ultimate Ajax Modules (Hard)

More Modules can be seen by scrolling horizontally.

This build focuses on increasing HP and DEF to allow Ultimate Ajax to tank a significant amount of damage from bosses and mobs. You will also be adding Shields which will be converted to HP through the Overwhelming HP module. This will ensure that you will get as much HP as possible to further increase his durability and survivability in battle.

Additionally, since you'll also be equipped with modules that decrease Skill Cooldowns, you'll be able to spam the Orbit Barrier and Hypercube abilities to constantly provide protection and support for your team.

Modules Guide: List of Modules

Alternative Descendant Module for Bosses

Module Change			Explanation
Stim Accelerant	>	Battle of Stamina	Recommended for bossing as this extends the duration of Shield Barrier skills.
Strong Mentality	>	Focus on Non-Attribute	Increases Skill Power and reduces Skill Cooldowns.

You can swap out your modules with the ones shown above to extend the duration of your Shield Barrier skills during boss fights. Since most bosses rely on range attacks, your Barrier skills will come in extremely handy to shield yourself from harm, as well as your teammates.

Descendant Module Substitutes for Mobbing

Module Change			Explanation
Weighing the Scales	>	HP Collector	Recommended for mobbing as it recovers HP after defeating an enemy.

It's better to use the HP Collector for mobbing as this module will instantly recover a decent amount of HP for each enemy that you kill, boosting your chances of survival since mobs tend to hit harder in Hard Mode.

Best Ultimate Ajax Weapons and Weapon Modules (Hard)

Weapon	Substat Priority
Tamer (For Bossing)	• Round Per Magazine • Bonus Firearm ATK Colossus (vs. Colossus) • Firearm ATK • Weak Point Damage
Thunder Cage (For Mobbing)	• Skill Critical Hit Rate • Skill Critical Hit Damage • Skill Effect Range • Skill Cost

Best Weapon Modules

More Modules can be seen by scrolling horizontally.

The Tamer is best used with modules that enhance the Weak Point Damage stat, since you'll be firing on a boss's vital body parts for the most part. Combine this with modules that also up the effectiveness of Firearm ATK, Critical Hit Rate and Damage, and you'll be killing bosses with little to no difficulty.

The same goes for Thunder Cage, with increased Firearm ATK and Critical Hit Rate, as well as this SMG's ability to discharge Electric Shockwaves, you will be able to clear out large mobs with your weapon's immense firepower.

Best Weapons Tier List

Best Ultimate Ajax Equipment (Hard)

Equipment	Substat Priority
Materialized Mechanics Reactor	• Non-Attribute Skill Power Boost Ratio • Tech Skill Power Boost Ration • Skill Duration Up
Annihilation Auxiliary Power	• Max HP • Fire Resistance
Annihilation Sensor	• MP Recovery in Combat • Max MP
Annihilation Memory	• Def • Electric Resistance • MP Recovery Multiplier
Annihilation Processor	• Max Shield • Toxic Resistance

Note that External Components with set bonuses have fixed main stats.

As Ultimate Ajax, you will be taking a lot of damage since you will be taking on the Tank role. Thus, the Annihilation Set will be the most beneficial to you since this set increases the damage of your weapon depending on the amount of HP lost. Meaning the more HP that you lose, the greater the damage that you will be able to do.

List of Reactors

List of External Components

Ultimate Ajax Playstyle Tips

Ultimate Ajax Playstyle Tips
Facetank Damage While Attacking a Boss Deploy Barrier Skills at the Correct Time

Facetank Damage While Attacking a Boss

With the Annihilation Set equipped, try to take damage while firing at the boss. The set will increase your weapon's damage the lesser HP that you have.

Deploy Barrier Skills at the Correct Time

Only use the Orbit Barrier skill when a boss is firing at you to reflect the damage back to them. For the Hypercube skill, you can use this when an ally is down as this skill summons a dome-shaped shield which protects you from enemy fire in all directions while you help out your teammate.

Best Ultimate Ajax Builds for Normal Mode

Jump to a Section!
Best Modules	Best Weapon and Modules
Best Reactor	Best External Components
▲Jump to Hard Mode Builds▲

Best Ultimate Ajax Modules (Normal)

Best Ultimate Ajax Modules
Potent Collector	When defeating an enemy, instantly recovers X% of Custom Resources at a X% chance. Characters with Custom Resources - Ajax - Bunny - Gley - Kyle
Iron Defense	DEF +X%, Skill Power Modifier +X%
Frugal Mindset	Skill Cost -X%, Skill Effect Range +X%
Non-Attribute Master	Skill Power +X%, Non-Attribute Skill Power +X%
Dual Claw	Modifies the Charged Sub Attack. Use a Dual Claw to attack when performing a Charged Sub Attack. As the Enhancement Level increases, Max Module Capacity increases. (Currently +X)
Tech Specialist	Tech Skill Power Modifier +X%
Dimension Specialist	Dimension Skill Power Modifier +X%
Skill Expansion	Skill Effect Range +X%, applies only to certain skills for each Descendant
Increased DEF	DEF +X%
Increased HP	Max HP +X%
Technician	Skill Power Modifier +X%
Strong Mentality	Skill Cost -X%
Nimble Fingers	Skill Cooldown -X%

The selected modules focus on boosting your skill's Power, Cost, Cooldown, and Range. These Modules also improve your survivability and will capitalize on increasing your DEF to maximize your Orbit Barrier.

This is a balanced build for Ajax that works for mob-clearing, crowd-control, boss DPS, and defending your teammates and mission objectives. This is also a great build to survive harder Void Intercept Battles, allowing you and your team to continuously apply DPS on bosses.

Modules Guide: List of Modules

Best Ultimate Ajax Weapon and Modules (Normal)

Weapon		Stat Priority
Greg's Reversed Fate		・Firearm ATK ・Firearm Critical Hit Damage ・Firearm Critical Hit Rate ・Weak Point Damage
Best Modules for Greg's Reversed Fate
Sweeping Squad	When defeating an enemy, Firearm ATK +X% for Xs at a X% chance (up to X Stacks).
Insight Support Ammo	Rounds per Magazine +X%, Firearm Critical Hit Rate +X%
Insight Focus	Firearm Critical Hit Rate +X%, Firearm Critical Hit Damage +X%
Weak Point Insight	Weak Point Damage +X%, Firearm Critical Hit Rate +X%
Sharpshooter	Firearm ATK +X%, Firearm Critical Hit Rate +X%
Action and Reaction	Firearm ATK +X%, Recoil +X%
Weak Point Sight	Weak Point Damage +X%
Better Concentration	Firearm Critical Hit Damage +X%
Better Insight	Firearm Critical Hit Rate +X%
Rifling Reinforcement	Firearm ATK +X%

We went with Greg's Reversed Fate as the best weapon for Ajax due to its unique ability to call bombardments, adding mob-clearing potential for Ajax. Since this build for Ajax mainly focuses on defense and crowd control, the main damage source will be from the weapons.

The weapon's modules focus on Critical Hit Rate, Weak Point Damage, and Firearm ATK to instantly kill mobs, and deal high DPS to bosses.
You can also use the Tamer which is a great weapon for mob-clearing and Void Bosses to accompany Greg's Reversed Fate.

Best Weapons Tier List

Best Ultimate Ajax Reactor (Normal)

Reactor	Stat Priority
Materialized Phase Reactor	・Skill Power ・Sub Attack Power ・Non-Attribute Skill Boost Ratio ・Dimension Skill Boost Ratio ・Tech Skill Boost Ratio

Using a Materialized Phase Reactor will give you the most bonus effects since most of Ajax's abilities are Non-Attribute and Dimension skills. For the substats, try to look for Non-Attribute Skill Boost Ratio and Tech Skill Boost Ratio or Dimension Skill Boost Ratio to improve the effectiveness of your skills.

Reactors Guide: List of Reactors

Best Ultimate Ajax External Components (Normal)

Set	Set Effect
Tomb Vanguard Set	2-Set Effect: ・Def +25% 4-Set Effect: ・Skill Power +2.6% ・Electric Resistance +6.6%
Substat Priority
Auxiliary Power	・Max HP ・DBNO Duration
Sensor	・Max MP ・Shield Recovery Out of Combat
Memory	・DEF ・Electric Resistance
Processor	・Max Shield ・Shield Recovery Modifier

The Tomb Vanguard Set will be enough to withstand incoming damage in Normal Mode. It also enhances Skill Power to further increase damage of Ultimate Ajax's Expulsion and Void Walk skills.

We highly recommend this set in early game as it is very easy to get, since you will only need to defeat Grave Walker on Common Difficulty.

List of External Components

How to Unlock Ultimate Ajax

Unlock Using the Research Institute

Research Time	Cost
36:00:00	900,000

Required Research Material	How to Get
Ultimate Ajax Code x1	・Intercept Battle: (Hard) (Dead Bride) Amorphous Material Pattern: 066 required ・ Intercept Battle: (Hard) (Devourer) Amorphous Material Pattern: 078 required ・ Agna Desert (Hard) - Abyssal Void Fusion Reactor - Agna Desert Vermilion Waste
Ultimate Ajax Enhanced Cells x1	・Research Research Materials Needed: ・Silicon x969 ・Flectorite x656 ・Balanced Plasma Battery x98 ・Ultimate Ajax Enhanced Cells Blueprint x1
Ultimate Ajax Spiral Catalyst x1	・Research Research Materials Needed: ・Nanopolymers x817 ・Shape Memory Alloy x1039 ・Fusion Plasma Battery x91 ・Ultimate Ajax Spiral Catalyst Blueprint x1
Ultimate Ajax Stabilizer x1	・Research Research Materials Needed: ・Ceramic Composite x919 ・Hellion x682 ・Anode Ion Particle x62 ・Ultimate Ajax Stabilizer Blueprint x1

You can unlock Ultimate Ajax through the Research Institute in Albion. Note that to acquire a Descendant using research, you need all the required items and gold to unlock this character.

Research Institute

Purchase Ultimate Ajax Using Caliber

Alternatively, you can unlock Descendants by purchasing them in the Shop. This method only requires Caliber, an in-game currency that you can buy with real money. Purchasing Ultimate Ajax in the Shop instantly unlocks the Descendant, allowing you to skip the item requirements and research time.

All Microtransactions

Ultimate Ajax Basic Info & Stats

Ultimate Ajax Basic Info
Ultimate Ajax Guardian of Conviction	Role	Tank
	Element	Non-Attribute
Description
"Through the Ultimate Project, Ajax has gained immense power. He leads the team with a Forcefield that protects allies while deflecting enemy attacks."

Stats

DEF	Max Shield	Shield Recovery	Max MP	Max HP
7435	516	4.88	187	1749

Ultimate Ajax Skills

Passive Skills

Skill	Type Effect
Event Horizon	Acquires Void Energy after using skills. When the Void Energy reaches its maximum amount, it enhances skills and grants additional effects.

Active Skills

Skill	Type Effect
Orbit Barrier	Dimension Creates a shield in front of Ajax. Durability increases proportionally to Ajax’s HP and DEF.
Void Walk	Tech Leaps into the air and lands on the ground to strike nearby enemies, stunning them.
Expulsion	Tech Strikes nearby enemies, knocking them back.
Hypercube	Dimension Creates a dome-shaped shield. Durability increases proportionally to Ajax’s HP and DEF.

Ultimate Ajax Exclusive Equipment

Ultimate Equipment, Territory Defense Specialized Battlesuit 'Belief'

The pinnacle of personal defense, the remains of this Ultimate equipment, 'Belief', were discovered in an Ancestors' facility in the Agna Desert. As it stands, they reconstructed as much of it as they could based on those remains and the fragmented blueprints. However, given its overwhelming power, despite its low reproduction ratio, the Magisters speculate that the original version of this Ultimate equipment was fitted with a battlesuit that rivaled that of a Colossus. The problem is, no one knows what defeated the Ancestors who donned such powerful suits.

Ultimate Ajax Skins

Jump to a Skin type!
Head	Body	Back
Chest	Ecive	Full Body
Grappling Hook	Make Up	Spawn

All Ultimate Ajax Head Skins

Ultimate Ajax's Conviction of Steel

All Ultimate Ajax Body Skins

Ultimate Ajax's Conviction of Steel

All Ultimate Ajax Back Skins

Baby Panda	Ammo Supply Box	White Rabbit Doll
Bear Cub	Satellite	Albion Rocket
Planetary Projector	Rocket Jet Pack	Double Z Wing
Run, Hamster	Advanced Material Backpack	Pink Salamander
Firefighting Tank

All Ultimate Ajax Chest Skins

Small Flashlight	HQ Access Card	Old Teddy Bear
Bunny-Ears Strap	Dynamite	Brave Squirrel
Emote Tag	Magister Researcher	Mark of Albion
Recorder

All Ultimate Ajax Ecive Skins

Continuity	Bio Scan	Heart

All Ultimate Ajax Full Body Skins

Panda's Adventure

Dinosaur Pajamas

All Ultimate Ajax Grappling Hook Skins

Special Supply

Advanced Material Engineering

All Ultimate Ajax Make Up Skins

Attention!	This character has no skins of this kind.

All Ultimate Ajax Spawn Skins

Magical Moment	Passion	Dismantling and Fusion
Snowman	Beyond the Unknown	Thunder and Lightning
Gale	Big Water Bomb	Wrong Direction

The First Descendant Related Guides

List of All Characters

All Base Characters

Ajax	Blair	Bunny
Enzo	Esiemo	Freyna
Gley	Hailey	Jayber
Kyle	Lepic	Luna
Sharen	Valby	Viessa
Yujin	-	-

All Ultimate Characters

Ultimate Ajax	Ultimate Bunny	Ultimate Freyna
Ultimate Gley	Ultimate Lepic	Ultimate Valby
Ultimate Viessa	-	-

Character Guides

Character Guides
List of All Builds	List of All Ultimate Descendants
All Character Skins	-