Any method to evaluate a PBN power?

I have some PBNs and I will create links to them to boost their power.

I need to see how much they boost, but my actual tool show me top 100 for KW and my PBNs aren't in the list.
- Of course, tools can't crawl them for obvious reasons.

Would you had any tips so I can evaluate the power increase of my PBNs?

Rank them for keywords related to your niche so they get traffic

Because a pbn is usually on an aged domain, the sandbox won't happen, so you can rank in a shorter timeframe. To evaluate the increase of pbn power, follow this process:

1. Write a piece of content targeting a medium keyword
2. Link from the homepage to that page
3. Wait a month
4. See rankings for that keyword
5. Build tier 2 links
6. Wait a month
7. See rankings for that keyword