After finishing the overall conversion from Jekyll to Hexo, i decided to use Staticman.net as my commenting system.
Staticman is based around creating Git commits, when a user post a comment. Via a webhook, a bot with access to my Git repository will commit/push the comment and Netlify will start a blog generation/deployment.
The hardest part of this process, is to build and deploy Staticman to Heroku and give it access to the repository. This took me a while to get working, but with help from this guide, it went fairly easy.
The next step is to create nested comments, with email notifications for users. I will release this as a plugin for Hexo when i feel it's ready.