Well, and here is the kambek! The non-trivial story of a site with a top HF site in tier-2 that fell to the bottom of the rendition continues. Here are some previous posts on it: once, two.

As I said in the previous post about the work done, in the end, NONE OF THIS HAS NOT HELPED I reversed everything, and, oh miracle, after a week or a little more - the fattest HF began to fly again in the top, however, so far only in the top 5, and it has not yet pulled up a bunch of other neighboring keys, which also flew out. This position is sometimes again flying out during the day for a hundred, and then again returned to the top 5 (we are talking about a key with a frequency of 200k +/-).

After consulting, we came to the conclusion that Google periodically shoves the site in the top, but something does not suit him and again throws down. And then I remembered that before the tightly established in the top 1-3 in HF and other HF keys, the site is exactly the same threw back and forth. But except for linking, did nothing else at that time, so either something flew off the links (but why then immediately for the top 100? and not the top 15, let's say?), or revision of the top of the issue of some ‍♂️.

What do we do next? How do I stabilize at the top?

1. In fact, everything is the same as planned. Almost ready to republish content, design on clean code with unique CSS classes, move away from WP, more usable design - in general, update the site, but keep the title, description and everything that starts with h1. It's already done anyway, so I won't cancel it.
2. I continue to buy article links, and on them still pour runs, quite fat. Linking turns out to be three-tiered, on the articles themselves junk links will not be, but on those links the third tier will be everything in a row, but it works like this, and not bad, especially if the articles selected good donors. So I do and on other sites, each link takes a lot of time, but it gives a gradual and real result.
3. We are languishing in anticipation, waiting for the tops. To be honest, I don't plan to do anything else, just planned linking and that's it, it's time to focus on other projects in other GEOs, where there are more «fat» prospects.