Arknights Endfield codes (March Tier List - Best Characters & Builds

Executive Summary

March is a pivotal time for Arknights: Endfield, as players are settling into the mid-game loop of exploring Talos-II and pushing through harder combat anomalies. While the headline feature of the month is the influx of fresh "All Arknights Endfield codes (March)," which provide a massive wave of premium currency, standard progression materials, and exclusive upgrade tokens, knowing exactly where to spend that newfound wealth is critical. This guide cuts through the noise, offering a definitive ranking of the game's current Operators to help you invest your redeemed resources optimally. Whether you are looking to dominate endgame content or simply clear the story smoothly, these quick takeaways will point you in the right direction.

• Invest in S-Tier DPS first: Your redeemed code currency should prioritize unlocking or upgrading top-tier damage dealers who scale well into the late game.
• Build a solid defensive core: Having at least one top-tier defender and healer from our "Solid Choices" section will prevent your team from wiping in prolonged engagements.
• Save duplicates for signature weapons: Avoid spreading your resources too thin; fully building two or three characters is better than having ten under-leveled ones.

Best in Slot

These are the undeniable kings and queens of the current meta. If you pulled them naturally or plan to spend your March redemption codes to acquire their selectors, you have made the absolute best choice possible. These units define the pacing of combat and make difficult encounters feel trivial.

Angelina (Caster / Support)

Angelina remains the undisputed best-in-slot support unit in Arknights: Endfield. Transitioning from her predecessor's roots, her Endfield iteration brings unmatched utility and crowd control. Her ability to slow down massive hordes of mechanized enemies while simultaneously boosting the attack speed of your primary DPS units makes her irreplaceable. In a game where positioning and timing are everything due to the real-time action combat, Angelina gives you the breathing room you need to reposition your Endfielders. Her elemental attacks also apply a stacking debuff that increases the damage your other units deal, making her a force multiplier that belongs in every single team composition.

Ch'en the Holungday (Vanguard / Melee DPS)

If there is one unit that embodies the power fantasy of Endfield's revamped combat system, it is Ch'en the Holungday. She operates as a hyper-aggressive melee DPS vanguard who excels at diving into enemy backlines. What pushes her into best-in-slot territory is her interrupt immunity during her ultimate skill phases. Many late-game bosses feature devastating area-of-effect attacks that force players to dodge, but Ch'en can simply tank through them while dealing catastrophic damage. When using your March codes, acquiring her duplicate shards to unlock her innate potential should be your highest priority if she is your flagship carry.

Hoederer (Defender / Tank)

Tanking in an action-RTS hybrid is notoriously difficult, but Hoederer makes it look easy. He is the definitive best-in-slot defensive unit because he operates on a unique paradigm: counter-attack scaling. Rather than just having a massive health pool and passive damage reduction, Hoederer’s block count increases dramatically when attacked, and his counterattacks hit in a wide frontal arc. This means that against the swarms of Talos-II indigenous lifeforms, he functions as a secondary DPS unit. He requires very few resources to maintain, allowing you to funnel all of your defensive upgrade materials from the March codes directly into your damage dealers.

Solid Choices

Operators in this category are the backbone of any strong roster. They might lack the completely overpowered quirks of the S-Tier, but they are incredibly reliable, easy to build, and will comfortably carry you through all general content without issue. If your best-in-slot units are occupied in another squad, these are the characters you turn to.

Ethan (Medic / Healer)

Ethan represents the gold standard of healing in Endfield right now. His healing mechanics are uniquely suited for the game's fast-paced action combat. Instead of traditional slow-over-time heals, Ethan deploys localized biological drones that provide burst healing when a unit's health drops below a certain threshold. This reactive healing is perfect for mitigating sudden burst damage from sniper enemies or trap activations. He also provides a minor passive regeneration aura, keeping your vanguard units topped off as they clear out the initial waves of an encounter.

Stormeye (Sniper / Ranged DPS)

When you need to deal with flying enemies or mechanically weak targets positioned behind heavy armor, Stormeye is your go-to option. His kit revolves around building up "Wind Charges" through basic attacks, which he then unleashes in a devastating circular burst. The reason he sits comfortably in the A-Tier is his incredible adaptability. You can build him purely for single-target boss damage or spec him slightly differently to act as a wave-clear specialist. He pairs beautifully with Angelina, as her attack speed buffs allow him to generate Wind Charges at an alarming rate.

Rosa (Support / Buffer)

Rosa is an exceptional offensive buffer who provides consistent value from the moment you deploy her. Her skill set focuses on granting allies bonus physical and elemental damage based on a percentage of her own attack stat. Because her buffs are applied globally to units within her aura range, she requires very little micromanagement, freeing you up to focus on dodging and positioning your main DPS characters. She is particularly effective in compositions that rely on rapid-hit attacks, making her a staple in most mid-to-late game team setups.

Biokin (Specialist / Debuffer)

Biokin excels at dismantling elite enemy armor. Her primary attacks apply a corrosive element that reduces the physical defense of the target over time. Against the heavily armored mechanical guardians found in the deeper sectors of Talos-II, Biokin's debuffs can effectively double the damage your DPS units are outputting. She requires a bit more tactical positioning than Rosa, as her debuff has a smaller area of effect, but the sheer damage calculus she provides makes her an incredibly solid choice for any challenging content.

Niche Picks

B-Tier units are not inherently bad; in fact, they are often exceptionally well-designed. However, they are ranked here because their usefulness drops off sharply outside of highly specific scenarios. You should only invest your limited March code resources into these characters if you already have a fully built S and A-tier roster and need them to clear a very specific type of content.

Gnosis (Caster / Trap Setter)

Gnosis is a master of area denial. His kit allows him to place elemental mines that detonate when enemies walk over them, dealing massive burst damage and applying crowd control. In specific game modes where enemies follow strict, predictable paths—such as certain defense simulations or escort missions—Gnosis is practically an S-tier unit. However, in standard open-world exploration and boss fights where enemies move dynamically and require sustained damage, his trap-laying mechanics feel too clunky and slow to keep up with the real-time action pacing.

Leonhardt (Guard / Dual-Wielder)

Leonhardt is a high-risk, high-reward glass cannon. He boasts some of the highest raw DPS numbers in the game, but his defensive stats are abysmal. To survive, players must constantly weave his dodge skill into their attack combos. In the hands of a veteran player who has memorized enemy attack animations, Leonhardt can shred bosses faster than Ch'en. For the average player, however, he will frequently die to untelegraphed AoE attacks, making him a liability. He is the definition of a niche pick reserved strictly for highly skilled players looking to set speedrun records.

Roberta (Vanguard / Summoner)

Roberta calls in automated combat drones to fight alongside her. On paper, this gives her incredible map presence, as she can theoretically be in two places at once. In practice, the AI controlling her drones is often unresponsive, getting stuck on terrain or failing to prioritize high-value targets. She is useful if you desperately need to distract a boss while you complete an objective in another part of the map, but her overall damage output and reliability fall short of standard vanguards.

Underperformers

This section covers the characters you should actively avoid spending your premium currency on. Whether due to outdated mechanics, severe power creep, or kits that fundamentally contradict the core gameplay loop of Endfield, these units will actively hinder your progression if you invest heavily in them.

Heavyhammer (Defender / Taunt Tank)

Heavyhammer relies on an archaic "taunt and soak" mechanic that simply does not work well in Arknights: Endfield. Unlike Arknights 1, where you could reliably direct enemy AI down a lane, Endfield's wider, more organic maps mean enemies will often just walk right past Heavyhammer to attack your backline. He lacks the ranged counter-attacks of Hoederer and has no utility outside of taking damage. Investing resources into him will leave you with a Defender who cannot hold a line and contributes zero damage.

Frostleaf (Sniper / Slow Attacker)

Frostleaf was designed around dealing massive, singular hits to frozen targets. Unfortunately, the action combat system of Endfield heavily favors rapid hit applications over slow, heavy strikes. By the time Frostleaf winds up her attack, the enemy has often moved out of the targeting reticle, or a faster DPS unit has already cleared the target. Furthermore, relying on freezing enemies is inconsistent in boss fights, as many late-game bosses possess freeze immunity. Her damage potential is theoretically high, but practically impossible to utilize consistently.

Matterhorn (Guard / Self-Buffer)

Matterhorn requires a massive setup time to reach his peak damage output. He needs to be on the field for an extended period, attacking basic enemies to build up his buff stacks. In a game where efficiency and speed are rewarded, standing around auto-attacking for twenty seconds just to deal respectable damage is a massive detriment. Every other guard in the A and S tiers can reach their damage peaks almost instantly through their active skills, rendering Matterhorn’s entire design philosophy obsolete.

Building Around Your Picks

Acquiring top-tier units with your March codes is only half the battle; knowing how to synergize them into a cohesive team is what actually clears content. Arknights: Endfield emphasizes elemental interactions, positional awareness, and real-time action combos, meaning team composition matters more than ever before.

The most universally effective setup you can build right now is the "Burst Synergy" composition. This team revolves entirely around Angelina. You position Angelina safely behind your main force, using her to group enemies up and slow their advance. Directly in front of her, you place your primary DPS—ideally Ch'en the Holungday or Stormeye. Because Angelina provides an attack speed buff and an elemental vulnerability debuff, your DPS will execute enemies at an accelerated rate. To protect Angelina, Hoederer should be held in reserve, deployed only when a cluster of enemies breaks through the slow field to ensure they are immediately met with sweeping counter-attacks. Finally, Ethan sits slightly off-center to provide reactive burst healing to whoever is taking aggro.

If you are running into enemies with incredibly high physical defense, you pivot slightly into a "Shred" composition. You keep the same defensive core of Hoederer and Ethan, but you replace your secondary DPS with Biokin. You have Biokin apply her armor-corrosion debuff to the target, and then you command your main DPS to unleash their highest damage skills while the enemy's defenses are virtually non-existent. Rosa can be swapped in for Angelina in this setup if you are confident in your manual dodging abilities and just want to maximize raw damage numbers.

Finally, remember to pay attention to elemental resistances in the later sectors of Talos-II. The game will explicitly warn you if a boss is heavily resistant to physical or a specific elemental type. Do not try to force a physical-damage guard like Matterhorn into a fight against a mech with 80% physical damage reduction, even if you have invested heavily into them. Always check the enemy intel logs before deploying your squad, and build a secondary team of elemental specialists (like Stormeye) to handle fights where your primary physical DPS is neutralized. By following these synergy guidelines and leaning on the rankings provided above, your massive haul of March codes will propel you straight to the top of the Endfield meta.