PBN footprint question

Let's say I have 3 authority sites and I want to use 2 of them to bump the third one.
Can I create FB fanpages to them all with the same account?

Also, the content on every site is high quality and unique, is guest posting (with do-follow links) on my own sites considered cheating?

And if not, can I use same adsense account on all of my authority sites?

I think this would be possible red flag for G to find my PBN and the whole pyramid scheme with which I would promote these three.

yes, if you use the same adsense account on 3 different money sites and if they have mostly all the same backlinks, google can track them and take you down. happened to me.

Don't guest post on your own sites unless they are hosted on different IPs. You can use the same Adsense account on all three sites.

SEO Power said:

Don't guest post on your own sites unless they are hosted on different IPs. You can use the same Adsense account on all three sites.

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looking for more expert opinions on this.