For many international travelers, Lima is the entry point to Peru. Tikaymi uses it as a practical start: recover from the flight, add a city experience if it fits, or connect with Paracas/Ica before flying to Cusco.
If you arrive late, one night in Lima before Cusco can reduce stress. If you want Paracas or Ica, plan at least one extra day so the coast route does not compete with your Cusco timing.
The coast works better before Cusco for many travelers because it avoids going from high altitude back to sea level and then changing plans again.
She checks arrival time, domestic flight options, hotel location and whether the coast route is worth adding for your number of days.