Load distribution
What is the best method/util to utilize multiple Windows PCs to crack with a distributed load?

It seems the methods I have seen on this forumĀ are either old or not Windows based.
You are probably looking at some wrapper around hashcat like hashtopolis, see https://hashtopolis.org

server: https://github.com/hashtopolis/server
clients/agents/crackers: https://github.com/hashtopolis/agent-python