The real Simulacrum Prime.

WFSim is the ultimate Warframe calculator — builder, simulator, optimizer. True to in-game numbers, down to the last proc. Theorycrafting, solved.

Weapons

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Mods

0 / 60 0 Forma

Exilus

Arcane

Evolution

Incarnon Genesis

Stats

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Build

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Sim

Tenno

Enemy

1 · Enemy

2 · Technique how the weapon is played — this gates the buffs below

3 · Buffs initial stacks + lock (locked = 100% uptime)

4 · Simulation

Rivens

All rivens every riven saved for this weapon, with what it actually rolls

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Optimize

self-contained — its own enemy, buffs and run budget

Mods search by name or effect; mark each as pool (search) or required

Max mods / build

Exilus slot the +1 slot — pool = slot options, req = pin one; nothing marked = the slot stays empty

Arcanes pool = searched options, req = pin the slot

Evolutions per tier: pool = searched options, req = pin

Enemy the optimizer's own scenario — independent of the Sim panel

Technique must match how you intend to play it — the winner is scored under these assumptions

Buffs across the whole scope — initial stacks + lock, applied per candidate

Final runs Finalists CPU threads the last round is guaranteed: finalists × final runs; earlier rounds only cut the field. CPU threads blank = all cores minus two, and workers run at low priority — the machine stays responsive either way