Search competitor dead links
Tick the competitors worth looking at. For each one, AkOOre asks which links pointing into their site land on a page that no longer answers — those dead pages, and the sites still linking to them, are your openings.
What AkOOre does with each competitor you tick
It asks its backlink index for every link pointing at that domain whose target does not answer, groups them by the dead address, and keeps the ones other sites link to — a competitor linking to its own dead page is their bug, not your opportunity, so those are counted separately and set aside.
Each dead page then carries who links to it and with what anchor text: that list is your outreach, and the anchor text is the clearest hint at what the page was about, so at what your replacement has to cover.