Thread:ZooBlazer/@comment-25819845-20160317104953/@comment-24031888-20160402200049

I can see the comment button. Below the "Categories" section, there is indicated: "0 comments, Showing 0 most recent" and below that there is an empty box, preceded by your Avatar, where you can enter a comment. Below the box is a red button "Post comment".

As far as I know, this cannot be activated for individual articles, but only for the entire wiki in the Wiki Features section. But perhaps, there is a solution via Wikia.css. There is one for hiding the page header and with it the Edit button, but that appears not to be activated in the case WesenZoo mentioned above.