Using Dedicated Nameservers And NS Records Instead Of A Records

I currently have 3 servers set up: a pair of dedicated nameservers and and a dedicated server for my wordpress instance. The nameservers direct all domain names pointed to them to the dedicated server which hosts the multisite wordpress instance containing the domain mapping plugin. I understand that typically domains that are to be mapped should have an A record added to point to the dedicated server however I would instead like domains to point to the 2 nameservers set up to point directly to this wordpress instance. How would I set this up? Any advice or help is appreciated. Thanks in advance guys!