Acting as a Luxury Travel Planner, design a 10-day Mediterranean yacht cruise itinerary. Recommend routes that explore the Greek islands, the Amalfi Coast, and the French Riviera. Include tips on hiring private yachts, visiting exclusive ports, and experiencing local luxury cuisine and wine. Provide advice on seasonal travel, yachting permits, and coordinating with local guides for onshore excursions. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>