Adobe Target development workflow using workspaces

Hello Gurus,

I am working on decentralising adobe target development to all the teams in the organisation. For this we are doing multiple things.

1. Moving Adobe target activity development into a version control SCM

2. Creating a fail-safe development life cycle

3. Creating a chatOps/ event based notification tool for better collaboration.

For 1, we have created something similar to what is mentioned in https://experienceleaguecommunities.adobe.com/t5/adobe-target-questions/implement-a-version-control-system-git-for-adobe-target-custom/qaq-p/373247 .

For 2, I am looking to implement a development life cycle as 

Local dev (local browser based cookie tampering and testing) -> Development workspace (mapped to a development environment of the website) -> Live/Default workspace ( mapped to live website )

Are there any recommended patterns/ best practices/ guides to implement this workspace based activity promotion life cycle OR any better way to implement a fail safe testing environment

For 3, I have asked for experts idea on https://experienceleaguecommunities.adobe.com/t5/adobe-target-questions/target-integration-with-slack-ms-teams/qaq-p/403473 

Thanks a lot of advance.