I’m currently doing a test with Invision. 
My community is very forum oriented and I’d like to have the posibility of a forum thread being generated for blog reactions (per blog article). 
Is that a feature? If yes, how to put in the right settings for that?

There would be no way to do that. Blog replies would stay within the blog application

Thank you for your swift reply 😊

No problem at all 🙂