Comments Box + Interuser Chat + Chat Support – altogether in the same site. How?

Here I go again with a major doubt. My IT team is building a marketplace website, and I've decided to add these 3 features:

1) a Comments/Discussion Forum on certain Resources/blog pages. I think about using one of these: Disqus, Isso, Remarkbox, Muut, HTMLCommentbox, or similar, where users would log using social credentials rather than the site's.

2) a Interuser chat window - users (buyers/sellers) will be able to chat each other after they meet certain criteria, triggering their chat window.

3) a Live Chat Support window. Currently I have implemented Tawk.to in our website on some pages only.

Now the tricky issue: I don't know how to implement all these 3 features successfully without damaging the UX. I am afraid a multitude of options might cause confusion for the user, because I want each feature to be unobtrusive as possible.

My questions are:

  • should the Live Chat Support only be available to unlogged users, or only when logged in users navigate to specific pages? Because if logged-in users have Interuser chat windows active, and suddenly while moving to a different page, the Chat Support could pop-up overlapping everything. That is the kind of erratic behaviour that I want to avoid.

  • would the Comments section on the specific areas cause some concern/awkwardness to logged in users? Once again I want to build the commented page visually simple as possible.

  • what are your views on these matters? Anyone had to implement these 3 features altogether and dealt with these "dilemmas"?

I really would appreciate any tips. Cheers, folks!