Duet Night Abyss is generous with ways to grind — and just as good at wasting your time if you chase the wrong nodes. A few systems matter early: characters, weapons, demon wedges, and the account progression tied to trials and mastery. AFK-friendly stages exist right now, and with the right setup you can level while stockpiling materials in the background.

AFK farming in Duet Night Abyss: what works now

Some stages allow true idle farming. Enemies spawn predictably, pathing is simple, and your build can clear waves without constant input. Rebecca is the standout for this; her kit enables stable AFK loops that reliably level characters you actually want to play.

  • Use Rebecca as the lead for AFK sessions, then slot the characters you intend to level in the remaining slots.
  • Pick stages with steady spawns and low burst damage; consistency beats peak rewards for unattended runs.
  • Run shorter AFK windows at first to confirm survivability and drop flow; extend duration once you see stable clears.

AFK sessions are best treated as background income — they won’t replace targeted farming for specific weapon parts or wedge types, but they will feed character XP and general drops while you do other things.

Early priorities: wedges, weapons, and a small core team

Focus your first days on building a compact roster and the materials that push raw power. Three well-built characters are easier to feed, faster to level, and safer to AFK than a scattered lineup.

  • Build three characters first. Concentrating upgrades increases clear speed and stabilizes AFK runs.
  • Target demon wedges early, especially Typhen’s Prime Serenity wedges for broad roster impact.
  • Keep weapons current; damage gating slows everything else, including wedge and mod farming.

Once those anchors are in place, your drop rate per minute improves everywhere — including unattended stages.

Daily resource you can’t skip: Secret Letter Clues

Secret Letter Clues drive core progression and should be collected every day. Daily Missions grant 15 Clues per day, which adds up quickly if you don’t let the clock run out. Treat them like a stamina bank: secure the daily allotment before you dive into longer grinds.

Tip: If time is tight, do the dailies first, queue an AFK session with Rebecca, then return for targeted farming.

Trials, Mastery Rank, and why EXP farming still matters

Trial EXP contributes to your Mastery Rank, unlocking or accelerating systems that make the rest of the grind more efficient. Fold trial runs into your loop even if you’re chasing wedges or mods — the account-level gains compound over time and widen the selection of viable farms.

  • Run a few trial clears during active play windows for guaranteed EXP.
  • Use AFK time to level characters so trial clears get easier and faster the next day.

What to farm and how to approach it

Goal Primary target How to farm AFK viability Notes
Roster power Demon wedges (Typhen’s Prime Serenity early) Run wedge-yielding content; prioritize consistent clears over peak difficulty Moderate Farm Typhen’s Prime Serenity wedges early for broad impact on your roster.
Damage Weapon materials Target weapon-focused nodes during active play Low–Moderate Manual targeting is faster; AFK can supplement but won’t replace focused runs.
Build depth Mods Run mod drop stages after core weapon levels are secured Moderate Stable AFK loops can feed basic mods while you level alts.
Account growth Trial EXP / Mastery Rank Include trials in daily loop Low Faster clears over time as your AFK-leveled characters mature.
Daily currency Secret Letter Clues Complete Daily Missions (15 per day) N/A Secure these before spending long blocks on farms.
Leveling Character EXP AFK-friendly stages with Rebecca lead High Rotate in characters you plan to use to passively level them.

A clean, repeatable loop

  • Log in, clear Daily Missions to bank your 15 Secret Letter Clues.
  • Run a short block of trials for Trial EXP and Mastery Rank progress.
  • Target demon wedges next; prioritize Typhen’s Prime Serenity wedges early to raise team power.
  • Shift to weapon material nodes to keep damage in step with your wedge gains.
  • Start an AFK session on a safe, consistent stage with Rebecca leading; slot two characters you want to level.
  • Return later to spend drops, check upgrades, and rotate in mods farming as your damage floor rises.
Tip: Keep AFK sessions conservative until you confirm your survivability. Short, reliable runs beat long wipe-prone attempts.

Team building for AFK stability

  • Three-character focus: building three first consolidates resources and improves AFK clear rates.
  • Front-load sustain and control: safer AFK loops come from steady damage and reliable survivability over bursty glass-cannon setups.
  • Rotate beneficiaries: once your core trio is steady, cycle in new characters to level passively during AFK windows.

When to switch from AFK to manual

AFK is great for baseline materials and character EXP. Switch to manual runs when you need:

  • Specific weapon parts or higher-rarity mods that drop better from tougher content.
  • Faster wedge accumulation on nodes your AFK setup can’t clear cleanly.
  • Trial clears that push Mastery Rank thresholds more efficiently.

If you keep the loop tight — dailies for Secret Letter Clues, targeted wedges with an early focus on Typhen’s Prime Serenity, and Rebecca-led AFK sessions to level your bench — Duet Night Abyss settles into a smooth rhythm. Build three characters first, protect your time with reliable stages, and use AFK as steady background income while you aim manual runs at the materials that matter most.