Best Practice for Test Data within Modularized Test Cases?

Hello, 

my team would like to use test case modularization as outlined here:

https://smartbear.com/blog/scale-your-test-management-in-jira/ 

Our situation:

• JIRA with Zephyr Scale
• 1 project (for 1 application)
• > 30 regression test cases
• typical test case length differs from 50 to 200 steps depending 
• various same or similar test steps across multiple test cases that vary only regarding test data
• all test cases are user tests mirroring the typical user's journey in the application

We started by creating modular test cases that each deal with one specific form within the application. These modules contain only the test steps and not the test data. The test data should be provided in the main test case that calls upon the respective module. However, there is no option to supply the imported test steps with additional test data within the main test case. 

Which approach / best practice would you recommend?

Best regards,

A.