Arknights: Endfield Si Rotation Guide: Main DPS and Last Rite Teams

To maximize damage with Si in Arknights: Endfield, you must choose between two distinct combat roles: fielding her as an on-field Main DPS during enemy stagger windows or using her as a quick-swap offensive support to enable Last Rite.

If Si is your primary carry, your priority is holding her cooldowns until your supports break the target's posture. If you run her alongside Last Rite, your priority is deploying Si's enhancing marks and swapping off immediately so Last Rite can capture the active damage modifiers.

How to Execute the Si Main DPS Rotation

As a Main DPS, Si requires dedicated on-field time to channel abilities into vulnerable targets. Starting combat with her high-cost skills without pre-buffing results in significant damage loss because her damage ceiling relies on external multipliers.

Execute her hypercarry sequence in this order:

1. Group and Prime: Engage with a utility or vanguard operative to group enemies within Si’s frontal attack range and initiate status buildup.
2. Apply Support Buffs: Cycle off-field supports to apply attack bonuses and defense reduction to the targets.
3. Trigger the Stagger: Deplete the target's posture gauge using a crowd-control skill or sub-DPS ability to trigger a stagger state.
4. Unleash Si's Burst: Swap to Si immediately once the target is staggered. Cast her primary offensive skill to generate resources, activate her secondary damage amplifier, and trigger her ultimate burst before the vulnerability window ends.
5. Rotate Out for Recovery: Swap Si off the field the moment her burst combo finishes. Do not keep her active to perform unbuffed basic attacks; cycle through your team's energy-generating skills until Si's cooldowns reset.

How to Run the Si and Last Rite Support Rotation

When paired with Last Rite, Si shifts to a minimal-field-time enabler. Her goal is not sustained personal damage, but creating the vulnerability window Last Rite needs to deal peak burst damage.

Execute the duo rotation using these steps:

1. Deploy Si's Multipliers: Swap in Si briefly to cast her amplifying skill and apply her offensive marks to the target.
2. Immediate Quick-Swap: Swap directly to Last Rite as soon as Si's enhancing animation finishes. Do not cast basic attacks with Si.
3. Last Rite Burst Window: Execute Last Rite’s heavy strikes immediately. Delaying this handoff risks letting the final hits of Last Rite's combo fall outside Si's buff duration.
4. Energy Reset: Rotate through secondary batteries and defensive supports to recharge squad energy before repeating Si's priming sequence.

Team Composition and Roster Options

Your party composition must align with whether Si or Last Rite serves as the primary carry. If premium five-star options are unavailable, fill slots with accessible alternatives that provide the same utility.

• When running Main DPS Si with budget supports, prioritize units with short cooldowns that apply consistent defense reduction. A shielder or interrupt-resistant buffer ensures Si completes her full casting animation without disruption.
• When running the Last Rite Duo, prioritize secondary supports equipped to generate energy, ensuring Si and Last Rite can loop their burst windows off cooldown.

Gearing and Stat Priorities

Building Si depends entirely on her role in the squad. Focusing on personal critical stats on a support build lowers team efficiency, while over-investing in energy recharge on a Main DPS build limits her burst damage against boss targets.

Main DPS Stat Build

• Primary Targets: Critical Rate, Critical Damage, and Direct Damage Multipliers.
• Secondary Targets: Attack Percentage and Skill Haste.
• Operational Trade-Off: Maximizes Si's burst output during stagger phases, but sacrifices personal energy generation and offers no utility to other teammates.

Last Rite Support Stat Build

• Primary Targets: Skill Haste, Cooldown Reduction, and Energy Recharge.
• Secondary Targets: Elemental Status Potency and Team Attack Buffs.
• Operational Trade-Off: Sacrifices Si's personal damage to ensure maximum uptime on her damage amplification marks and smooth team energy flow.