SMT SJ Redux Fusion Calculator

Calculator

Example Data Table

Formula Used

Average Parent Rank = Sum of active parent ranks / active parent count.

Target Rank = Round average rank + 1 + moon modifier + support modifier + route type modifier.

Estimated Level = Average parent level + ((target rank - average rank) × 1.25).

Skill Chance = 70 - desired skills penalty + affinity bonus + source bonus + mutation contribution.

Route Score = readiness score + skill score + rank value + cost score.

How to Use This Calculator

Choose the fusion mode first. Enter the race, level, and rank for each parent. Use parent C only when triple mode is selected.

Set the hero level to check whether the estimated result is usable. Add desired inherited skills, mutation chance, and affinity strength.

Enter parent costs and a compendium discount. Press Calculate to view the result above the form. Use CSV or PDF buttons to save the same result.

Fusion Planning Overview

This calculator helps players plan fusion routes before spending macca, sources, or rare stock slots. It is built as an estimator for Strange Journey Redux style planning. It does not need a full demon database. Instead, it uses race pairing, rank averages, level checks, cost pressure, and skill goals. That makes it useful for early page testing, guide drafts, and custom data entry.

Why Rank Matters

Many fusion systems sort demons inside each race by rank or level. A parent pair is averaged. Then the result is moved toward a nearby rank. This page follows that idea. You enter each parent level and rank. The tool finds an average, applies moon and sub app modifiers, then builds a target rank. The same process also estimates a result level.

Race Pair Logic

Race choice changes the expected family of the result. The included matrix covers common fantasy races. It is easy to edit. Add more pairs if your site stores exact chart data. When no direct pair exists, the fallback rotates through the race list. This keeps the calculator usable for every selection.

Skill And Cost Planning

Fusion is not only about level. Players also care about inherited skills. The calculator scores your desired skills against affinity, source support, and mutation chance. It also totals compendium costs. A discount field helps compare expensive and cheaper routes. The final score blends readiness, skill chance, rank value, and cost pressure.

Using Results Wisely

Treat the output as a planning guide. It can show whether a route is practical for your hero level. It can warn when the target level is too high. It can also show when a desired skill plan is risky. Use the CSV export for spreadsheets. Use the PDF export for simple notes.

Customization Ideas

You can replace the sample matrix with exact chart rows. You can add a demon database table. You can also connect saved skills, alignments, sources, and unlock flags. The page already separates inputs, calculations, exports, and display logic. That structure makes later expansion simple. Keep testing with known recipes before publishing. Store trusted recipes in a small table. Then compare estimated outputs against confirmed game results during review rounds for better accuracy.