Weakness Assault is Honkai: Star Rail's Tides of War Day 4 challenge. See the best teams and Support Functions, how to beat Day 4, stage details, and all the rewards here!

Tides of War Event Guides
Day 1	Day 2	Day 3
Day 4	Day 5	Day 6

Weakness Assault Best Team

Tides of War Day 4 Best Team

Best Team for Day 4
Himeko	Xueyi	Ruan Mei	Lynx

The best team for Day 4 consists of the Trial Characters available for the stage. Himeko and Xueyi will be your DPS characters while Ruan Mei increases your Weakness Break efficiency and Lynx provides healing.

Use Himeko and Xueyi's AoE attacks to bring down the Toughness of all enemies on the field much faster. This will help raise your Grit Values and activate the buffs of higher Grit Phases.

Best Support Functions for Day 4

Support Function	Buff Effect
Expose Weakness	Grit Phase 2 (Option) Breaking any enemy's Weakness will dispel the boss enemy's Weakness Protection until the boss enemy takes their turn again. Increases all allies' Weakness Break efficiency by 50% and deals a set amount of additional DMG to enemies that already have their Weakness Broken.
Pursuer	Grit Phase 3 (Option) Increases DMG taken by enemies afflicted with Weakness Break by 80%.

We recommend using the Expose Weakness and Pursuer Support functions so that it'll be easier to Weakness Break boss enemies even outside of Grit Phase 4.

How to Beat Weakness Assault

Weakness Break Other Enemies First

Boss enemies will have Weakness Protection that prevents you from reducing their Toughness. With the Pursuer Support Function equipped, you can Weakness Break other enemies to remove it. Try to Weakness Break enemies with weaker Toughness bars first.

Reach Bronya During the Third Cycle

Based on our test runs, you should be fighting Bronya during the 3rd cycle or earlier to perfect Day 4. Follow the same strategy of getting Weakness Breaks on other enemies first.

Target Bosses When Protection is Gone

Once the boss has their Weakness Protection gone, you can start focusing your attacks on them. Use AoE attacks so that you can also target other enemies on the field and raise your Grit Value.

Spam Your Attacks in Grit Phase 4

In Grit Phase 4, all enemies on the field will be Weakness Broken, so you can freely spam as many attacks as you can. Keep the boss as your main target so that they get the brunt of the damage.

Weakness Assault Stage Details

Tides of War Day 4 Trial Characters

Trial	Character Build
Ruan Mei	Memories of the Past Messenger Traversing Hackerspace Fleet of the Ageless
Himeko	Make the World Clamor Firesmith of Lava-Forging Inert Salsotto
Silver Wolf	Resolution Shines As Pearls of Sweat Genius of Brilliant Stars Pan-Cosmic Commercial Enterprise
Lynx	Warmth Shortens Cold Nights Passerby of Wandering Cloud Fleet of the Ageless
Xueyi	On the Fall of an Aeon Genius of Brilliant Stars Inert Salsotto

Tides of War Day 4 Grit Mechanics

Tides of War Day 4 Support Functions

Support Function	Grit Phase & Buff Effect
Ignore Weakness	Grit Phase 2 (Option) After Breaking an enemy's Weakness, deals a seat amount of DMG that reduces Toughness to all enemies. This Toughness reduction ignores Weakness Protection.
Expose Weakness	Grit Phase 2 (Option) Breaking any enemy's Weakness will dispel the boss enemy's Weakness Protection until the boss enemy takes their turn again. Increases all allies' Weakness Break efficiency by 50% and deals a set amount of additional DMG to enemies that already have their Weakness Broken.
Shattershield	Grit Phase 3 (Option) When attacking a Weakness Broken enemy, there is a 30% fixed chance to deal 3 times the DMG.
Pursuer	Grit Phase 3 (Option) Increases DMG taken by enemies afflicted with Weakness Break by 80%.
Mega Booster	Grit Phase 4 (Fixed) All enemies will be afflicted with Weakness Broken and trigger all Weakness Break effects applicable to the unit. Increases all allies' Weakness Break efficiency by 200%. Enemies that already have their Weakness Broken receive increased DMG by 150% and upon being attacked will have their action delayed by 5%.

Phases 2 and 3 each have two Support Functions you can choose from. You can only pick one for each phase.

Tides of War Day 4 Enemies

Enemies	Weaknesses
Ice Out of Space
Stormbringer
Voidranger - Reaver
Abundance Sprite - Malefic Ape
The Ascended
Disciples of Sanctus Medicus - Internal Alchemist
Bronya
Automaton Direwolf
Silvermane Cannoneer

Weakness Assault Rewards

Tides of War Day 4 Rewards

Objectives	Rewards
Enter “Grit Phase 4: Power Awoken” 1 time.	Stellar Jade x40 Traveler's Guide x3 Refined Aether x3
Defeat the first wave's boss.	Stellar Jade x40 Traveler's Guide x3 Credit x30,000
Defeat the second wave's boss.	Relic Remains x20 Lost Crystal x3
Defeat the third wave's boss.	Relic Remains x10 Credit x20,000

Weakness Assault Information

Part of Tides of War

Weakness Assault is the Day 4 stage of Tides of War where you Weakness Break enemies to earn extra Grit Value. In this stage, Erudition and other AoE characters will be the best ones to use for Day 4.

Tides of War Event Guide

Honkai: Star Related Guides

Tides of War Event Guide

Tides of War Day Guides

Stage	Trial Characters
Day 1	◆ Acheron ◆ Black Swan ◆ Kafka ◆ Gallagher ◆ Pela
Day 2	◆ Jingliu ◆ Blade ◆ Bronya ◆ Luocha ◆ Lynx
Day 3	◆ Imbibitor Lunae ◆ Argenti ◆ Sparkle ◆ Huohuo ◆ Tingyun
Day 4	◆ Ruan Mei ◆ Himeko ◆ Silver Wolf ◆ Lynx ◆ Xueyi
Day 5	◆ Seele ◆ Jing Yuan ◆ Fu Xuan ◆ Sparkle ◆ Tingyun
Day 6	◆ Dr. Ratio ◆ Topaz ◆ Argenti ◆ Aventurine ◆ Hanya

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