Sol's RNG guide
Sol's RNG Books Guide
Books should be planned like any other progression resource: define the target, estimate the roll or resource cost, and check whether the payoff changes your real Aura odds enough to matter for your next chase.
Quick answer
Books should be planned like any other progression resource: define the target, estimate the roll or resource cost, and check whether the payoff changes your real Aura odds enough to matter for your next chase.
Define the book goal first
Players often ask about books as if every upgrade has the same value. The practical value depends on your target Aura, current luck, and how many rolls you can make after the upgrade.
- Write down the target Aura before spending.
- Compare before-and-after luck values.
- Avoid spending only because the item sounds rare.
Use probability before resource spending
A small boost can matter over a long session, but it may be barely visible over a short one. Use cumulative chance to decide whether the book changes your plan.
When to stop optimizing
If the boosted result still needs far more rolls than you can make, choose a closer target or wait until you can stack more meaningful improvements.
FAQ
Are books always worth it in Sol's RNG?
No. Their value depends on the target, cost, and how much extra rolling you can do after using them.
How do I compare book upgrades?
Put each resulting luck value into the calculator or planner and compare the roll milestones.
Should I chase rare Auras before upgrading?
If the upgrade strongly improves your target chance, upgrade first. If it barely moves the math, choose based on your resource goals.