Honkai: Star Rail · Progression guide

Honkai Star Rail Energy Regeneration Rope or ATK Rope?

An Energy Regeneration Rate Rope earns its slot when it gets an Ultimate ready at a point that matters. Count the character’s actual actions between Ultimates, then check what happens when enemies stop hitting them or a teammate uses a different skill.

Quick answer · Our advice

Count Energy up to the turn where you want the next Ultimate. Multiply eligible sources by the build’s ERR factor and add only the grants documented as fixed. If both ropes reach the same useful turn, compare the value of the stat you give up.[1][3]

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By GachaLootGuide reviewed November 9, 2026

Global Version 4.6 reference context. Ordinary fixed-cost Ultimate examples with explicitly classified Energy inputs.

How to compare two Link Ropes over a rotation

Energy Regeneration Rate changes eligible Energy gain. The Energy reference documents sources such as Basic ATKs, Skills, hits and effects that grant Energy under their own rules. A character’s exact action values and fixed grants can differ by kit.[1]

Our advice

Start immediately after spending the Ultimate and account for any Energy it returns. Write down every action before the desired cast. Check the recipient, trigger and scaling for teammate and Light Cone effects. Compare both builds with the same action sequence first.

Our suggested checks

Swipe across the table to see all columns.

How to compare two Link Ropes over a rotation comparison
Energy entry	How to record it	Why it changes the answer
Repeatable actions and Ultimate return	Enter base values and classify whether ERR applies	These are the backbone of the next rotation
Confirmed fixed grant	Add separately if its rule bypasses ERR	Multiplying it could invent a breakpoint
Being hit, getting a kill or a random proc	Model a second run with the trigger	Its absence can delay the cast
Alternative gauge or changing Ultimate cost	Use the specific kit and current combat rules	A fixed-cost Energy budget can give the wrong result

References[1][3]

Worked example where an ERR Rope saves a turn

Worked example · GachaLoot calculation

A 120-Energy Ultimate after three Skills

Assumptions

Hypothetical character. The last Ultimate supplied 5 scalable Energy. Three Skills supply 30 each. One verified fixed grant supplies 10 before the deadline.
The ATK Rope build has a 1.00 Energy factor; the ERR Rope build shows a 1.194 factor. No hits, kills or other Energy are assumed.

Scalable Energy through the third action5 + 3 × 30 = 95 Energy
ATK Rope by the deadline95 × 1.00 + 10 = 105 Energy, short by 15
ERR Rope by the deadline95 × 1.194 + 10 = 123.43 Energy generated, enough to reach 120
ATK Rope after one further 20-Energy Basic105 + 20 = 125 Energy generated, one action later

Result: Use the ERR option if that earlier Ultimate matters more than the ATK you give up. Run the sequence with the actual team to make sure it can fund three Skills.

Limits of this example: The model omits overcap behavior, alternate gauges and enemy Energy. The 10-point source is an explicitly fixed input for this example, not a claim about a named teammate.

Mechanic references[1][2][3]

Worked example where both Ropes hit the same cast

Worked example · GachaLoot calculation

A 110-Energy Ultimate with a two-turn deadline

Assumptions

Before turn two you have 60 scalable Energy. Through the second action you have 105 scalable Energy in total and a 10-point fixed grant has arrived. The grant has not arrived before turn two.
ERR factors are 1.00 and 1.194. The ATK build has 2,900 total ATK and the ERR build has 2,550 total ATK in the tested state.

ERR before the second action60 × 1.194 = 71.64 Energy, too early to cast
ATK and ERR builds through the second action105 + 10; 105 × 1.194 + 10 = 115 and 135.37 Energy generated; both reach 110
ATK difference relative to the ERR build(2,900 − 2,550) ÷ 2,550 × 100 = About 13.7% higher displayed ATK

Result: Both Ropes reach the same two-action schedule. If the character scales with ATK, the higher ATK build is worth testing. Repeat the comparison without the fixed grant if that trigger is uncertain.

Limits of this example: Displayed ATK difference is not a prediction of team damage. It omits separate damage multipliers, set effects and the value of any Energy carried into another sequence.

Mechanic references[1][2][3]

Check what changes after the first Ultimate

Our advice: Repeat from the second cast. Starting Energy, opening Techniques and a front-loaded support effect can make the first Ultimate earlier than the sustained rotation.
Our advice: If an ally grants Energy, verify when it arrives and whether that source is fixed or scalable. Keep the same Speed, action advance and skill usage when isolating the Rope.
Our advice: Compare one quiet attempt with one where the character is hit or earns a kill. Treat any earlier Ultimate as conditional unless the same trigger is reliable in the content you play.[1][3]

Star Rail Energy Rope questions

Does an ERR Rope reduce the Ultimate’s Energy cost?

It changes eligible Energy income. The budget still uses the cost shown for the Ultimate and its current mode or kit.[1]

Should I always use ATK if both Ropes give the same turn count?

Our advice: Compare the actual cast timing and stat scaling. If ERR protects the schedule after a missed trigger, that reliability can still be useful.[1][3]

Can I use this method for a non-ATK character?

Our advice: Yes. Replace ATK with the stat the kit actually uses, then compare the same two schedules.[3][2]

Sources and review scope

The Energy and Relic references document standard inputs and examples. KQM’s Fu Xuan guide is used for its method of comparing schedules and conditional income; its character-specific Rope advice and numbers are not carried over. Our examples use hypothetical characters and are not live combat tests.

Review dates describe this article and its references, not hands-on testing of a game account. Passages marked “Our advice” are GachaLoot’s recommendations. Check the current kit, challenge rules and upgrade preview for your own account.

[1] Energy — sources and regeneration
Honkai: Star Rail Wiki — indexed systems reference · Checked November 9, 2026
Ordinary Energy sources and the ERR distinction. Exact current kit exceptions need their own description.
[2] Relics Overview
KQM — independent systems guide · Checked November 9, 2026
Relic and Planar Ornament stat context. The guide does not adopt historical set rankings.
[3] Fu Xuan Guide — Energy Regeneration Rate vs HP% Link Rope
KQM — character rotation analysis · Checked November 9, 2026
A documented example of comparing Ultimate cadence and conditional Energy before selecting a Rope.
[4] Dance With the Beast Before Moonrise, Version 4.6
HoYoverse — official update notice · Checked November 9, 2026
Dated Global update context. It does not establish the examples’ numeric inputs.

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