By itself, EPIC is a faithful replacement for ircII, which is very bare-bones. Consequently, EPIC is generally used in conjunction with a script - an EPIC script creates a different, more complete user experience.
This page contains links to some scripts that you may want to consider. Every script pack is different, because every user is different. Try a few and see what you like! Most scripts are very tweakable to suit your needs.
There are a few scripts for EPIC4, unfortunately, most (if not all) of them are no longer maintained or supported. You can find some of them in this web archive: