Majestic

Link Graphs are created by looking through the top Fresh Index links that surround your search, and then building a map of how the discovered sites all link to each other.

They are incredibly useful for finding where natural, or unnatural, networks may surround a website, or to build a survey of how any subset of your website's links are connected.

You can even use Sorting and Filtering in Site Explorer Backlinks and Context tabs to decide which Tier 1 links you would like to focus on.

IDEA | Use backlink filters to try to find out which Tier 2 sites depend on recently deleted links, and may be about to fall off the wider link profile for this site.