Sherwin, I am not sure about this but I don't think blog comments with self-promotional links will give you a long-term success. We all know that most blogs are moderated and if a link is detected, it often goes to the "for approval" queue.
Instead, I'd recommend that you do your blog commenting campaign by using your social media accounts such as Facebook and Twitter. If you comment on someone else's blog gets to the top as one of the most liked comments, people will get intrigued at what you do. So, they'll click on your profile (the one that shows on your comment) and they'll be redirected to your social media account (FB or Twitter). Your social media profile will do the introduction (or selling if you like) on who you are and what you do. This is what we do for our clients who are using our blog commenting service.
I hope that helps, Sherwin.
JC