I'll Stick to your 7 ways. Can you refer me some resource who can discover undesirable backlink profile and might help us take out from Google. I indicate the link which isn't great for my site and spoiling my rank on Google. So I'm able to take out them. Remember https://www.bseo-agency.com/blogs/127925/Safely-Buy-Backlinks-to-Boost-Your-SEO-Strategy