Or maybe stop worrying about whether a site is a "high authority" site in the first place.
Just take a look at their actual content and where else they're linking. If their content is high quality and the other sites they link to also tend to be of high quality, then there's a really good chance that a link from them would be a good link to have.
If, on the other hand, their content is a bunch of crappy, hastily-written (or worse yet, spun) "guest posts" -- or they have little to no content at all -- and when they link out, it's to other similarly crappy sites, then a link from them might not be so valuable.
You don't need to use automated tools to evaluate the quality of a page.