Building Blog Network - How to Handle DNS

I've started building a blog network for my own sites out of high PR expired domains. I've lined up a host that can provide me with a VPS and add on IPs in different C classes. I've read that it is beneficial, maybe essential, to have each domain on its own unique nameservers. How is that usually handled? I usually just run the DNS off the DNS server on the VPS, but in that case all domains are linked by the same nameserver.

I could run dns off the registrar, but all my domains are at namecheap so that does not look like much a solution either. Any suggestions?

Having a Unique nameserver is providing good security too. You might ask them for different nameserver too. Some host will give it to you after your request.

just my 2 cents, will using cloudflare help?

I use small shared accounts with lots of different hosts for this reason. Not every domain has its own unique nameserver, but having a few with the same one on a server with thousands of other domains is pretty safe.