Just finished making a personal blog using blocs. I know there are easier solutions and I would not recommend doing this for a client. I like having total control over the design and layout.
I used Disqus on each blog page. It seems to work good as long as you only have one comments area per page.
I used MailChimp for signing up for updates. MailChimp also post automatically to my social media accounts.
For new post I just duplicate a blog post and rename page and content. (could have made a template)
For archives I plan on duplicating the home page and change the name. Maybe also change the header area.
Thank You to @Eldar for some suggestions. Comments always welcomed.