PBN domain selection: TF vs TF/CF Ratio

When selecting domains for PBNs I've seen advice to focus on TF 10+ with little regard for CF, and also that the ratio of TF/CF is important, sometimes mentioned it should be above 0.8, or above 1 etc.

Often these two conflict, where a domain has a great ratio, but TF might only be 6 or 7 for example. Others are TF 11 (for example) with a CF of 16. If I go by one rule, the last domain has over 10+ TF and is worth moving on to the next metric to check. If I go by the other rule, it's got a TF/CF ratio of 11/16 = 0.6875 and should be sidestepped.

Is there some kind of consensus about this, or are these rules able to be relatively flexibly applied when taking into account things like niche relevance also?

TF/CF ratio is irrelevant and has absolutely no telling value.

Niche relevancy is much more important than that really.

Also first metric you should focus on is actually the number of referring domains.

And if there is any ratio you should take a look at, it's the ratio of referring domains and referring IPs.

Read this - https://www.blackhatworld.com/seo/c...osts-metrics-spam-and-niche-relevancy.916518/

Great writeup on the other thread Nargil, super helpful!

niche relevant, spam score, DA History lots of factor there when you Buy Expired Domains

Don't look too closely at any metrics when dealing with lower level expired domains. Backlinks, Backlinks, Backlinks.