Methodology
This progression ranking favors verified multiplier impact, long-term usefulness, and whether the value is stable after updates. Exact pack gates and drop rates remain unknown unless a source states them.
A practical tier-style progression snapshot for keeper-card investment, offline setup, mutations, traits, and Tower planning.
No progression entries match that filter.
Each entry has a short reason. The methodology favors stable income impact and confirmed multipliers over rumor-only values.
After code refreshes, mutation updates, or major balance changes such as Boss Rotation.