I finally managed to pull this off. I set up ns1.ciuly.com, ns2.ciuly.com a while ago and now ns3.ciuly.com and migrated 2 of the websites to use them.
I will be monitoring how things work and if all ok, I’ll probably migrate all my websites on them.
The reason for this is that I plan on supporting dynamic sub-domains on at least the new alus.ws url shortener website I launched yesterday.