Levels belong to one miner
Select a miner on the plot and spend cash on three tracks. Damage Level raises hit power. Mining Speed Level raises how often they swing. Speed Level raises how fast they move between nodes and the chest. Levels do not move to a different character.
What the caps looked like
Damage Level was seen past 50 on Epic and Exotic miners, and at 100 on a unit named Saitama. Speed and Mining Speed were seen stopping much earlier, around levels 16 to 17. Those caps are observations, not a posted formula.
Order that matches the ceilings
- Press Equip Best so a new drop is not ignored.
- Max Mining Speed and Speed on the keeper if they really stop in the teens. That is a small bill next to endless Damage levels.
- Put the rest of the upgrade cash into Damage Level on that same keeper.
- Stop when the next Damage level costs more than the research node or gate that would unlock a better pickaxe.
Why one unit beats a wide roster
A higher rarity has the better base, so the same level buys more damage there. Commons are replaced when a deeper mine drops stronger units. Funding every new find delays both the gate and the pickaxe that would multiply the keeper.
Food and potions sit on top of levels. Sessions reported Pizza, including Iron Pizza, Golden Potions, and Strength Potions raising damage. Durations and exact multipliers for those items were not published.