I removed this mod because I didn't want to be limited to a discipline on the first play of EBWizardry. But now when I kill Spirits they don't drop spectral dust and it crashed my server. I put this mod back and it works just fine.

How do I configure this mod so that I can have it installed, but so I can progress through EBW normally?

This mod shouldn't affect the spectral dust drops.
Why would you need this mod, if you don't want to use any of its features?