Data Collectors, DataCapture & many proxies: capture data from all the proxies: best practices need,

[optimism]

Hi, Community!
I have quite a big number of proxies under my support.
Management would like to collect analytics data
(app names, user names, dates-times & so on)
from all of the proxies & export data to BigQuery.
Exported data is going to be consumed &
processed by some Machine Learning.

Given:

• many proxies.
• following Data Collectors: "dc_app_name", "dc_req_email",
  "dc_req_username", "dc_response_header_date" & so on.
• separate DataCapture policies in each proxy.
• OR SharedFlow with DataCapture policy.

My question is, what are the best practices for the "Data Collectors" & "DataCapture" policy?
Specifically, from the documentation & my tiny Proof Of Concept, it seems to me that
at first look,

Apigee Hybrid captures data, e.g. emails from all the many proxies
into the single "dc_req_email" resulting that all the emails from all proxies being stored mixed,
"Many proxies - to One data collector (emails)".

However,  in the DataCapture policy  |  Apigee X  |  Google Cloud there is a note:

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• If you use a Data Collector in multiple policies, the captured data will be overwritten by the last policy that executes.