BG3 Party Builder

A tool to plan and optimize a Baldur's Gate 3 party, helping players balance classes, roles, and synergy.

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Total Calculations Run

< 15ms

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4.9 / 5.0

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About This Tool

Purpose-built decision support for BG3 party planning. It analyzes available character options and constraints to propose a balanced roster. The tool focuses on role coverage, synergy, and feasibility, enabling players to make informed trade-offs.
It conceptually models frontline, damage, control, healing, and utility roles and scores candidates based on fit, synergy with existing picks, and level-capped capabilities. The result is a recommended roster with rationale and notes on risk or contingency.
This tool benefits solo players optimizing for sessions, co-op groups coordinating a run, and dungeon masters planning NPC party members. The approach is domain-driven, relying on standard class archetypes, spell economy, and action economy considerations to ensure practical viability during combat and exploration.

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How to Use

Provide inputs: enter party_size, available characters, and constraints.
Choose optimization goals: balance roles, synergy, and difficulty.
Run calculation: generate recommended party composition and skill distribution.
Review outputs: inspect suggested classes, archetypes, and item priorities.
Adjust constraints and re-run as needed.

Frequently Asked Questions

Find Quick Answers

What inputs are required?

You must provide the party size and a list of candidate characters with class and level. Constraints help steer the result, such as prohibiting certain classes or requiring a specific role emphasis. Missing inputs trigger validation errors.

How is optimization performed?

The tool uses a multi-criterion heuristic that scores each candidate by role fit, synergy with other picks, and level feasibility. It then selects the highest-scoring feasible combination under given constraints.

Can it handle single-player campaigns?

Yes. The tool can optimize for a party that a single player can manage, or propose NPC companions to fill gaps. It can adapt to different difficulty goals and campaign pacing.

Does it account for spell slots and class balance?

It models core class roles and spell economy at a high level, ensuring the recommended roster provides needed frontline, damage, control, healing, and utility by tier and level.

Need to run multiple calculations?

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