IME, you probably need a fret leveling. The Epi's I have played in the store all could have used some fret work. Also, if you can track down a used Babicz or Hipshot bridge, they both allow for finer adjustment (individual strings) of string height than the 3 point bridge.
I also bought myself one of these:
BASS GUITAR NECK STRAIGHT EDGE (Notched) LUTHIERS TOOL | eBay
My 2014 Gibson T-Bird came with almost no tension on the truss rod. The neck had a significant bow in it. I tightened by eye but after a day or so, it would be over tightened and buzz. After using this and making much smaller adjustments, I was able to get the neck almost flat. A slight amount of relief is what I like, and it has remained there ever since. I am not skilled enough to do it by feel. This tool allowed me a visual confirmation before doing anything.
I then was able to determine that I had a fret (number 19) that was a good bit higher than its brethren by using the tools below:
GeetarGizmos THERMO-FORMED Fret Crowning Dressing Level File Luthier Tool Stick
STAINLESS STEEL FRET ROCKER LUTHIER GUITAR TOOL
Set of 2 Fret Guards Sanding Fingerboard Protector for Guitar Bass Ukelele | eBay
Small Fret End Dressing File with one smooth edge to prevent fingerboard damage
Now the action is right where I like it, no buzz. This tool helped in setting the string radius:
Fret Board Under String Radius Gauge Set, 089453 | eBay
In the 34 years that I had been playing I always took my bass to a luthier, sometimes with less than desirable results. I had been away for so long from playing, I no longer had "my guy".
When I got my first T-Bird, the 2006 that I have since sold, I took it o a local "master" for set up that I had been referred to. My bass came back pretty close to the way I gave it to him and I paid $125 for it. He was cool and told me that if I did not like the set up, I could it bring back for adjustments at no charge but that meant travel and not having the bass for a week or more at a time. I just figured it was time to jump in the pool and learn how to swim....