PBN Platform Footprint

Hey chaps,

In terms of CMS footprint, what guidelines would you recommend for say a 10 site PBN?

Say:
8 Wordpress
1 HTML
1 Joomla,

Do you think that would be good enough for diversity. (Don't worry about other footprints, I have those covered).

Thanks in advance

That's more than enough really. Even with full WP, there's no danger with only 10 sites. 28% of the internet runs on Wordpress, so it's no big deal. I doubt that platforms are one of the Google's algorithm to raise red flags. It's too unreliable. But yeh, with what you outlined, you should be perfectly safe.