Multiple landing pages to test multiple segments?

I currently have a product that is "generally useful". And I have several potential market segments in mind to try focusing on.

Problem with my landing page (getrumin.com) is that it seems too generic, I can't get specific with the messaging or workflow.

In this case what would be more fruitful:

• Having multiple sub pages as landing pages?
• Having multiple websites (domains)?
• Having a single landing page to test one segment at a time?

Would appreciate any pointers 🙏