Is there a way to not have the Corona DR popup on the slaves when rendering?
Almost in a hidden mode. If that makes sense.
https://coronarenderer.freshdesk.com/support/solutions/articles/12000007896
(https://forum.corona-renderer.com/ Running drServer as windows service )
Fully hidden when doing so 
Good Luck
Now… I wonder if Thinkbox deadline will allow it to be run as a service?
Should be.