Wow, you are getting lots of interest... sadly the JE is the toughest class for combat. And it really doesn't start getting interesting until about cl33, or OL100. At that point, with three beams & a more matured electronic warfare platform, I would kill what I liked up to and well above my CL during live. My typical targets were Chavez and whatever dropped good stuff, or hung out in the areas I mined. Oh yeah, Zenshai, lots of Zenshai.
Capella was part of the early, extremely tedious, grindy part and Aragoth in the latter, and virtually anywhere the cl was right once the horrendous grind was over.
Did you have specific CLs in mind for a start? The typical MOBs in the starter areas are a given. After that, it is all dependent on skill/loadout. Hunting even NEAR your CL in the teens thru about 30 can be quite problemmatic, with equipment being a, if not THE, critical factor. That is, to my mind, the weakest and most frustrating time in a JEs career. Of course, that opens an entirely new subject... Equipment!