@herself I don't know of a better option than Disqus for comments, but I feel your concerns with it. HTTPS should "just work" once your domain stuff is figured out. Have you added discombobulated.co.nz to the Domains section of Blot's settings? I looked at my baty.blog DNS settings and
www.baty.blog is a CNAME (alias) pointing to
blot.im (IP 22.214.171.124).
discombobulated.co.nz is pointing to 126.96.36.199 so it looks like you need to make some DNS changes first. Clear as mud?
@herself I just show webmentions as comments, I do not like comments forms. They are prone to spams. And I eventually learn to ignore them. But I understand why a simpler commenting system would be important.
Blot supports https once domain is setup, so I use it. And on domain, do you want root to point to a different host and only a subdomin to blot? I have a similar setup, not sure if that’s what you are looking for.
@herself I don't remember having trouble authenticating but I think I used github.com as an authentication provider at webmention.io, not micro.blog. I'm not sure if you can use micro.blog or not, I'm afraid. Maybe you could add a link to discombobulated.co.nz on your Gitlab or Twitter profiles if you have accounts there.