When choosing domain for pbn, is niche more important than metrics?

Hi

One of my competitor just started ranking top 3 in my niche for very competitive keywords. I checked his backlink profile and was able to get hold of 8 pbn domains. All these domains had a tf between 5-14. All the pbns have normal rds, they were average in quality as well as quantity. But all these domains were very closely related to his niche. For example, if he was selling tyres, all the pbn domains were related to cars.

So, is it the time that we shift our focus from spending $XXX…

When choosing domain for pbn, is niche more important than metrics?