Look at https://arxiv.org/pdf/1502.06461 if you want to try a chord dht again.

Kademlia is a lot less intuitive, but by not ever assuming it's tables are correct, it handles and corrects inconsistency (and malicious nodes) better.

Chapter 6 of this pile of (my) crap https://scholarworks.gsu.edu/cs_diss/106/ talks about doing latency optimization on dht routing. Basically just embedding then network graph into a metric space.