Click engine
Damage Power per click times clicks per second is the base income of the whole game. Measure it before anything else, because every hero comparison is stacked on top of it.
Check: Run the Damage Power guide's measurement method after every training milestone.
Training cadence
Training is the officially stated path to stronger heroes. Put it between battle pushes instead of waiting for a wall, so the next hero is already unlocking while you fight.
Check: If a fight stalls, train first, then re-test the fight before blaming your lineup.
Hero additions
The official description says each hero helps you defeat enemies, but hero names and stats have no published table. Add one hero at a time and let a before/after fight time tell you what it is worth.
Check: Time the same boss twice: with and without the new hero. Keep what measurably helps.
Battle edge
Fight the strongest enemy or boss you can actually clear. Heroes help you battle, so the highest clearable fight is where new unlocks pay off fastest.
Check: When clears become slow, drop one fight tier, train, and come back.
Checkpoint log
The Stage 1–4 and World 2 badges are the game's own progress markers. Record when you earn each one and what your Damage Power was, and your own numbers become your roadmap.
Check: Compare your checkpoint powers with the funnel data on the wiki pages.