Resonance Solstice Deep Algorithm BA-04 Clear Guide

To clear Deep Algorithm BA-04 in Resonance Solstice, break the boss's damage-mitigation barrier using crowd control and shield-shredding abilities, then unleash your primary damage dealer's high-cost burst skills during the resulting stagger window. Throughout the fight, pre-cast shields before telegraphed boss channels land, and keep low-cost cycling cards in your deck to avoid energy starvation and card lockouts.

Team Composition and Required Roles

Deep Algorithm BA-04 pairs heavy incoming area-of-effect damage with strict phase timers. Pure offense will quickly lead to wiped backline units, while an overly defensive setup will fail to beat the encounter timer. Balance your team across four specific combat roles:

Build your deck with a low average card cost. While your primary damage dealer requires expensive burst cards to capitalize on stagger periods, pairing them with an enabler who cycles low-cost cards ensures you maintain steady card draw and energy flow.

Boss Mechanics and Defensive Timing

The BA-04 boss alternates between heavily fortified barrier phases and charged offensive bursts:

1. Defensive Shield Phase: The boss gains a dense damage-reduction barrier. Direct offensive abilities deal heavily diminished damage while this shield is active. Do not spend ultimate skills or high-cost burst attacks during this phase.
2. Channeling Phase: At set intervals and health thresholds, the boss initiates a telegraphed charge sequence followed by a multi-hit strike. Deploy frontline shields and damage-mitigation buffs just before the attack hits so the mitigation lasts through the entire channel. If your tank carries an interrupt or stun, use it during this cast bar to cancel the strike entirely.
3. Stagger Vulnerability Window: Depleting the boss's barrier triggers a temporary stagger state. The boss takes increased damage and ceases attacks, creating your main window to burn down its health bar.

Card Rotation and Energy Priorities

Surviving the encounter requires disciplined hand economy and resource pooling:

• Cycle in the Opening Turns: Spend early energy on low-cost draw cards, energy ramp abilities, and initial defensive stances. Avoid playing raw, unbuffed damage cards right away.
• Pool Energy Before Stagger: Stop playing non-essential filler cards once the boss's barrier drops below 20%. Stockpile energy so your damage dealer has full resources the moment the stagger window opens.
• Chain Buffs Before Bursting: Cast attack buffs, critical enhancers, and target defense debuffs immediately before triggering your damage dealer's highest-cost finishers.
• Retain a Defensive Card: Always keep at least one barrier or emergency heal card in your active hand. Drawing a hand full of expensive offensive cards right as the boss begins a channel is the most common cause of a wipe.

Stage Execution Checklist

If your squad is failing to clear BA-04, adjust your approach using these checks:

• Target Priority: Verify that single-target debuffs and attacks are locked directly onto the primary boss rather than incidental algorithmic summons.
• Shield Timing: Cast defensive barriers right before incoming multi-hit strikes connect; casting shields reactively after the first hit wastes significant effective health.
• Deck Balance: If your hand frequently stalls with unplayable skills, replace heavy utility cards with lower-cost draw or generation skills to keep the deck moving.