PBN'S or Blog commenting?

Pbn's means blogs that have regularly posted articles in various niches have a good ranking position and increase your SERP. Blog comment is a link building creating a positive comment with the backlink of the website and commends post

PBN's are more powerful because you control them but they come at a risk, the core focus should be PBN and some blog comments here and there..

It's all about diversity.

If you have nothing but 300 expired domains linking to your website you are running a pretty big risk of being penalised. Depending on the quality of the pbn.

But if you have 300 expired domains plus, 20 guest posts, 20 HQ blog comments, 30 social profiles, 50 HQ web 2.0, 20 HQ niche edits on aged domains the risk is much lower in my opinion.