Resonance Solstice: How to Clear Depth Calculus HE-04

To clear Depth Calculus HE-04 in Resonance Solstice, maintain reserve energy to counter the boss's channeled area-of-effect (AoE) attack, use low-cost cycle cards to prevent hand clogs, and trigger your carry's burst rotation immediately after the boss finishes its strike.

Encounter Threats and Counters

HE-04 combines continuous physical damage on your vanguard with a lethal, charged AoE attack that wipes fragile backline units if left unmitigated.

Team Composition and Roles

A stable setup requires one vanguard tank, one defensive healer or shielder, one to two card-draw supports, and a dedicated carry.

• Vanguard Tank: Run durable units such as Fenia or Gordian to soak routine melee pressure using self-buffs and passive mitigation without draining team cost.
• Defensive Support: Use shielders or healers like Arina or Rachael to protect the team during AoE spikes.
• Cycle and Utility: Deploy units like Shani or Dorothy to draw cheap 1-cost and 2-cost cards, cycle past dead utility, and generate energy.
• Primary Carry: Rely on burst damage dealers such as Charlotte or Caroline to rapidly burn down boss health during post-channel recovery windows.

Energy Economy and Card Cycling

Energy starvation causes party wipes when defensive counters cannot be played in time. Manage your deck flow using these principles:

• Hold an Energy Buffer: Never spend your last remaining energy on basic damage cards if the boss's charge bar is above 70%. Keep resources ready for an immediate barrier or interrupt.
• Discard Clutter Early: Play or cycle unneeded offensive utility during calm phases so that emergency mitigation tools stay available in your active hand.
• Prioritize Low-Cost Draw: Use cheap card draw to cycle your deck without stalling your energy curve.
• Pre-cast Cost Reduction: Activate energy acceleration or cost-discount skills right before deploying your carry's combo.

Timing Defensive Counters

The boss's channeled attack is the primary failure point in HE-04. Watch the cast bar beneath the boss's health meter to determine your response:

1. Interrupt Option: If a crowd control skill (such as stun or freeze) is in hand, cast it immediately when the channel bar begins filling to cancel the attack outright.
2. Mitigation Option: If an interrupt is unavailable, hold your shields until the channel bar reaches approximately 75% completion. Activating shields too early causes them to expire before the multi-hit damage finishes landing.

Step-by-Step Combat Sequence

1. Stabilize the Opening (0:00–0:15): Cast vanguard defensive buffs and draw engines. Do not spend heavy energy on carry skills until incoming frontline damage is under control.
2. Mitigate the First Channel: Watch the boss cast bar. Either interrupt the cast immediately or deploy teamwide barriers at 75% cast progress.
3. Cycle for Burst Setup: Once the attack resolves, play low-cost utility cards to draw your carry's primary damage cards and ready your leader skill.
4. Discharge Burst Damage: Activate your leader skill and stack damage buffs. Unload your carry's strongest attacks while the boss is in post-cast recovery.
5. Repeat and Execute: Maintain your energy buffer through subsequent attack cycles. As the boss reaches low health, hold your defensive plan intact and commit remaining resources to finish the fight.