I also would say it depends on what kind of EK you want to be, but I'd take it in a different direction.
The Ek normally gets access to illusion and enchantment spells. Sounds like Jedi mind tricks to me. So what powers are cool for a Jedi to have?
Well, you can see how often those subclasses come up in my game. Oops.Are you sure? That sounds like the Arcane Trickster subclass of Rogue. I think that it should be Abjuration and Evocation spells.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.