Blog Commenting still can be the best way to backlink for your site. I would say its must to create a natural link profile for your site.
If you can do it correctly without breaking any rules, then its good to google.
I take blog commenting as one of the bridges of networking. It helps me to connect bloggers while reaching out to them. Yes, again it helps backlinking for my site.
” your keyword”
allintitle: “your keyword”
allinurl: “your keyword”