Southern Italy, southern France, and the Mediterranean islands: how should I organize these itineraries?

Hello! I’m Brazilian and I plan to dedicate 15 to 25 vacation days per year to enjoy the European summer (between June and September). Two itineraries I’ve been considering are the following:

SOUTHERN ITALY + ISLANDS

*Rome 🚪

*Amalfi Coast

*Capri

*Puglia

*Sardinia 🏝️

*Sicily 🏝️

*Malta 🏝️

SOUTH OF FRANCE + ISLAND

*Paris 🚪

*Monaco

*Nice

*Cannes

*Saint-Tropez

*Antibes

*Provence / Marseille / Cassis

*Corsica 🏝️

My question is:

OPTION 1:

Should I take 25 days per year and do both full itineraries (one each year)? Is there enough time or is it too rushed?

OPTION 2:

- do only Southern Italy now;

- go only to the South of France next year;

- leave the Mediterranean islands (Corsica + Sardinia + Sicily + Malta) for a third trip.

OPTION 3:

- do only Southern Italy now;

- go to the South of France + Corsica next year;

- leave Sardinia + Sicily + Malta for a third trip.

OPTION 4:

- do Southern Italy + Sardinia now;

- go to the South of France + Corsica next year;

- leave Sicily + Malta for a third trip.

OPTION 5:

- do Southern Italy + Sicily + Malta now;

- go to the South of France + Corsica + Sardinia next year.

In short: how would you split these destinations, knowing that I have up to 25 days for each trip?

The budget isn't an issue. My only concern is the logistics of the itineraries, taking into account the time available for each trip.