Wiki URL: civclassic.miraheze.org
Your custom domain: civclassic.civwiki.org
Do you want Let's Encrypt: Yes
@Zppix They have pointed the nameservers, not the CNAME, so you need to make a DNS PR.
@Squareblob please ignore the message above, you are correctly pointed to us :)
Sorry for the confusion, I have setup the custom domain! Enjoy!