Best Practices for Multi-Client Knowledge Bases Explained

What are best practices for knowledge bases when you have multiple clients? For instance, let's say I want to write blog posts for different clients. Is it best to have one "Blog Post Writer" Lindy with different paths that contains for each client or a Lindy that has a step to talk to another Lindy that contains the particular client's knowledge base? If so, how do you do that? I would think it's best to have a dedicated knowledge base (as a separate Lindy), so you can talk to it in many different automations.