What kind of community features are there in Ghost CMS?
It's much easier if you can maintain the community and blog separately, then you can host everything community on Flarum and no need for shared login. You can host both apps on separate domains or subfolders.
If you want to use Flarum for blog comments you'll need a custom Integration. Flarum has an "embed" extension that can be used to create an iframe for comments. My WordPress Integration uses an improved version of that feature to integrate comments with WP.
