Best practice counting page views CJA

Hi, 

I am using Adobe's demo environment and page view events are configured that way.

Home page events:

- web.webpagedetails.pageViews

Product page events:

- commerce.productView

Commerce checkouts events:

- web.webpagedetails.pageViews

I would like to ask more experienced colleagues what is the best practice for this?

If we would like to have all page views in CJA taking into account above configuration we need to sum it using calculated metrics:

all page views = commerce.productView + web.webpagedetails.pageViews

How you approach this on your projects?