What are some necessary building addons for a dark rp server.

The reason why I want to know this is because I want to have a darkrpserver where people can build whatever they want. And I want for them tobe able to do so as efficiently as possible. This is my server collection "http://steamcommunity.com/sharedfiles/filedetails/?id=1339956972".

Building tools:
* Precision tool
* Stacker tool
* Advanced Dupe 2
* Wire
* Textscreens