What to do after finishing most of the game's content.

I started playing the game a month and a half ago. I've cleared Rinascita and the coastline, and most of the game modes. It's not that I'm already bored, it's just that he has nothing else to do besides farm. Do you have any advice for me? I'm a free-to-play player. And I've even farmed a lot of Astrites for my upcoming characters (Phrolova + those from 3.0). Thanks for your feedback.