The direct answer

Use Chill to learn sections and camera control. Use Hard once you can repeat the route and want the full risk.

Practice sequence

  1. 1Identify your goal
  2. 2Use Chill for repetition
  3. 3Switch to Hard for full runs
  4. 4Keep the same route notes

Use a tool

Open Rotation Trial for movement drills, or the Input Visualizer when timing and key overlap are the main problem.