Should compilers be kept in artifactory?
There are a few main reasons why you would use Artifactory (or any other binary repository manager) over a traditional file storage (in your case NFS). 


The ability to manage your artifact versions
A central location to access artifacts across infrastructure (which you have accomplished with NFS)
The ability to download/recreate previous versions of the artifacts (you could also use a git/svn repository for this, but it would be contain MUCH more irrelevant metadata about the binary artifacts than would be useful to a user)
You want to control who/what has permissions to access the stored artifacts


If none of these are applicable in your use-case, I would say that Artifactory would be overkill and the effort to create and maintain it would not out way the value you would receive from it. Although I have used it in the past, and it is a great tool for what it aims to accomplish :)