Or maybe I'll write our whole plan for 13th of August so maybe you'll find something better for me. The plan is: we want to spent as much time as possible in Marseille, than have a stop in Monaco and finally reach Genova from where we have a night train to Napoli Centrale. I've found something like this:
11:59 Marseille Saint-Chalres - Nice Ville 14:34 (train 4653)
14:53 Nice-Ville - Monaco-Monte-Carlo 15:15 (RE 86039)
a stop in Monaco and then
18:47 Monaco-Monte-Carlo - Ventimiglia 19:12 (RE 86053)
19:51 Ventimiglia - Genova Piazza Principe 23:02 (R 11389)
23:53 Genova Piazza Principe - Napoli Centrale 09:11 (ICN 799)
Our main goal is to spend as much time as possible in Marseille and Monaco and catch the train to Napoli. Maybe you'll advise me something better?