from my experience you do not need to be a cisco expert to pass the exam.
if you were the main administrator since version 9 and have a good understanding of all OSI layers and have a basic understanding of how networks work (what is a core-switch, branch office-router, firewall etc.) you should be more than fine.
again, if you actively use, maintain and administrate orion with NPM, APM and NTA you should do fine :)
you might want to have some basic knowledge about sql too (not programming, just the concepts)