I am trying to edit the following mesh from a game:

I would like to know if it is possible to link the 30 buttresses and walls together so that if I edit one of them, I will edit the other 29 as well? I am aware of X mirroring but from what I have read, this only appears to allow editing of two parts of a mesh at once.
Alternatively, is it possible for me to delete all except one of the walls and buttresses then, once I've finished my editing to the two, copy-paste those vertices in a circle around the centre?
I am still learning Blender so if anyone who answers can give step-by-step instructions, I would greatly appreciate it. Thanks!