How do I size application server RZ10 parameters

What are some of the guidelines for sizing application server. I have 3 app servers and a CI/DB. I have properly sized the CI/DB with parameters based on HW and expected usage.

Is there a guideline which parameters that I can reuse from the CI/DB instance?

I haven't found any app server RZ10 parameters that are only for app server.

Or can I simply copy parameters from CI/DB over to the app server and update the domain name for each app server?

Thanks

Weyland Yutani