I think running own recursor is better in terms of latency introduced comparing to DNS over Tor
Discussion
Been trying to do exactly that.
And it's genuenly ass. x.x At least, for what I need.
Case in point: https://gist.github.com/IngwiePhoenix/b228996676cfc3b52fe22d707a959aa5
I think I need to put another resolver behind coreDNS...or infront?
Honestly, I have no idea. Looking at sdns, powerdns, unbound and friends.
I don't understand birb.it part, but I guess you would like to have recursor infront of coredns, and that way you can have all of the flexibility CoreDNS offers while doing recursion and caching by unbound.