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Cheapest stack · confidence target · AFK window

Plan the hunt, not the grind.

Tell the planner your target slime, the confidence you want, and how long you’ll be AFK. It enumerates every stack that reaches the target and ranks them by your chosen axis: time, Robux, potions, or simplicity. No fake authority — you pick what “cheapest” means.

Math transparentMulti-axis sort

Rank the stacks, read the table

Target Slime
Mutation
Confidence Target
AFK Window
Baseline Stack

Default is zero luck. Click above to pull your stack from /luck-calculator and rank augmentations.

Top plan to reach
90.0% on Lucky
< 1 min
R7 + Ultra Luck + 2× Gamepass + Lucky + Huge Lucky + Big Dice + Apple + Roll Speed
99 R$ · 3 consumables
Confidence based on community-reported data. Lucky×3, potion duration 3 min, and roll-speed baseline (5/min standard, 7.5/min boosted) are reconciled from 3+ sources but await in-game primary verification.
Sorted
StackR$PotionsEffective oddsTime to 90%Reaches 8h?
R7 + Ultra Luck + 2× Gamepass + Lucky + Huge Lucky + Big Dice + Apple + Roll Speed9931 / 3< 1 min> 99.9%
R7 + Ultra Luck + 2× Gamepass + Lucky + Huge Lucky + Big Dice + Roll Speed9921 / 4~1 min> 99.9%
R7 + Ultra Luck + 2× Gamepass + Lucky + Huge Lucky + Big Dice + Apple9931 / 3~1 min> 99.9%
R7 + Ultra Luck + 2× Gamepass + Lucky + Huge Lucky + Apple + Roll Speed9921 / 5~1 min> 99.9%

How the planner ranks

  1. 01

    Enumerate every combination

    For each rebirth tier (R0-R7), each gamepass on/off, each passive, and each potion (respecting potionClass exclusivity), the planner computes effective luck and confidence-in-window.

  2. 02

    Filter to reachable

    If a stack reaches your confidence target inside the AFK window, it stays in the pool. When zero stacks reach it, the planner falls back to the 3 closest.

  3. 03

    Sort by your chosen axis

    Time, Robux, potions used, or stack simplicity. Tie-breakers cascade so identical inputs always return identical rankings — no flicker, no fake authority.

Editor’s note

The planner is opinionated about one thing: there is no universal “cheapest plan.” A Robux-free stack that takes 9 hours is cheap if you’re AFK overnight, expensive if you’re grinding live. Pick the sort axis that matches your constraint. Anyone telling you Plan #1 is “the best” without asking what you’re optimising for is selling you a vibe.

The Slime Desk · 2026-05-18

Planner FAQ

How is "cheapest" defined?
There is no single "cheapest" because Robux gamepasses, code-redeemed potions, and time are different costs. The planner ranks by your chosen axis: by time, by Robux cost, by potion uses, or by stack simplicity. Pick the axis that matches what you actually want to optimise.
Why does the planner sometimes say "no plan reaches target"?
When the math says even the maximum stack can't reach your confidence in the given window. The planner still shows the closest 3 stacks so you can compare. Try lowering confidence (95% → 90%) or extending the window (8h → 24h).
What does "Apply your current stack" do?
It pulls the boosts you have toggled on /luck-calculator and uses them as the baseline. The planner then suggests what to ADD on top, rather than rebuilding from zero. Useful when you already have R3 + Lucky and want to know "what next".
Are the recommended stacks always realistic?
The math is exact, the cost columns are concrete (Robux, potion count). But our data has known unverified entries — Lucky×3, potion 3-min, roll speed baselines are reconciled from 3+ community sources, not yet in-game primary-verified. Treat plans as guidance, not gospel, until we get definitive data.
Why don't I see Luck Potion AND Ultra Luck Potion in the same plan?
They're mutually exclusive — same `potionClass`. Drinking one overrides the other; only the highest-multiplier active potion counts. The planner enforces this so you don't see impossible "stack both" combinations.
Does the planner factor in pity / Jackpot Dice?
No. Jackpot Dice are single-use rare-guaranteed items handled outside the standard luck math. Treat your dice inventory as bonus pulls, not a baked-in stack.

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