Introduction and core purpose
The FEH Combat Sim is a tool designed to compare unit performance under standardized conditions in Fire Emblem Heroes. By inputting stats, skills, weapons, and setting levels and enemy configurations, players estimate damage, combat results, and effective performance before using them in Arena, Aether Raids, or story maps. This guide explains what the simulation measures, how its mechanics translate to in‑game outcomes, and how to account for real‑world variables such as randomness, team support, and map constraints.
What the FEH Combat Sim measures
At its core, the FEH Combat Sim evaluates damage output, survival time, and kill probability based on base stats, individual weapon and skill stats, and assumed enemy defenses. It typically assumes ideal conditions: full health, no random variance, and no disruptive status effects. As a result, the numbers are useful for relative comparisons—ranking units against one another—rather than exact predictions of every encounter. Players should treat outputs as directional guidance, not deterministic outcomes.
Key assumptions baked into simulations
- Units and enemies fight at fixed, full HP with no random damage deviation.
- Skills that trigger conditionally may not activate in every scenario the sim presents.
- Assumed enemy stats and resistances may not match real encounters.
Common inputs and their impact on results
Accuracy in a FEH Combat Sim depends on providing correct and consistent inputs. Small mismatches in level, weapon choice, or skill activation assumptions can shift results noticeably, especially at low health or with narrow damage ranges. Below is a concise reference for what to align between sim and reality.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Unit level and stat caps | Matches in‑game level, including IVs and refinements | In‑game menu / Tooltip |
| Weapon stats and refine level | Current weapon Might/Heal, Accuracy, Crit, and Refine bonus | Armory screen |
| Active and passive skills | ||
| Enemy base stats and resistances | Official enemy data from patch notes or reliable databases | Published patch notes / Verified databases |
| Terrain and map effects |
Using the sim for team building and optimization
Players often rely on the FEH Combat Sim to answer questions like “Who wins this duel?” or “Which follow-up unit should I prioritize?” It excels at identifying clear advantages and hard counters, such as a unit with effective damage against a specific enemy type. When comparing multiple options, run consistent inputs across variants and focus on deltas rather than absolute numbers. This reduces noise from rounding and keeps comparisons reliable across builds.
Practical checklist for meaningful simulation
- Match unit level and IV spreads to your intended use.
- Confirm weapon refine level and Skill activation conditions.
- Use verified enemy data for defense, resistance, and stat caps.
- Review whether terrain or map effects are enabled.
- Run multiple iterations when results are close to gauge sensitivity.
Limitations and what the sim does not model
No combat simulator perfectly mirrors live battle conditions. The FEH Combat Sim generally omits or simplifies critical factors such as combat resolution randomness, enemy follow‑up attacks, skill procs tied to taking damage, and timing differences in skill activation windows. In addition, team‑wide buffs, Arena assist patterns, and map hazards can meaningfully change outcomes that the sim presents as fixed. Always weigh simulated numbers against observed in‑game performance.
Translating simulated results into in‑game decisions
Use simulated outcomes as one input within a broader decision framework. Favor units that show consistent advantages across multiple reasonable setups, and be skeptical of narrow margins that flip with small stat changes. Pair simulation insights with actual arena testing, ladder data, and raid logs to confirm whether predicted edges materialize. When a unit performs strongly in the sim and in practice, it is usually safe to prioritize pulls, merges, or inherited setups around that choice.
Best practices and common pitfalls to avoid
Treat the FEH Combat Sim as a comparative and educational tool rather than a precise predictor. Avoid overreliance on single‑result outputs, especially for units with mixed matchups or narrow win conditions. Keep inputs aligned between sim and reality, and when possible, validate key picks through small in‑game trials in low‑stakes maps. Document your assumptions so you can revisit them when game patches shift stats or skills.