Hello,
Would I create a VDI install package for those servers, and then treat my other Citrix servers (Xenapp Controllers, Xenapp Storefron Servers, License/SQL/File Servers, etc) as a just a standard VM client?
Yes, create Virtual Desktop Infrastructure (VDI) install packages for those servers and then different for Citrix servers.
Check these Articles:
A Symantec White Paper - Securing the Citrix Virtual Desktop
https://www.symantec.com/connect/sites/default/files/SYMC%20Whitepaper-Virtual%20Desktop%20Infrastructure%20for%20Citrix%20SEP%20v4_0.pdf
About reduced-size client installation packages
https://support.symantec.com/en_US/article.HOWTO111070.html
Symantec Endpoint Protection for VDI best practices
https://support.symantec.com/en_US/article.HOWTO124251.html
Hope that helps!!