Aayla does have end-game uses, those relic levels aren't necessarily a waste even if they are premature.
Better for efficiency's sake to add them after JKLS is up and running.
That said, I always, always say that if you're having fun, you're playing the game right. While there are more efficient paths to power, if those paths strike you as boring or no fun or undesirable for some other reason, then you'll lose the desire to play the game and never finish the "efficient" path.
it's not efficient if it never gets you there.
So I support you doing whatever makes you happy. If, however, what makes you happy is - at least at this stage - killing some Geo Brood Alpha squads, be aware that even with JKR's ability to ignore taunt & mark GBA, it can be tough to do enough damage to finish the kill before mark wears off. AoE damage is much more effective than even strong hits against a single, marked toon. Jedi Knight Anakin is a good start - again, if what's going to make you happy is getting wins against Geos with your JKR squad - and Aayla isn't much of a help against that particular enemy in that particular squad with those particular allies (and leader).
If you really love your Jedi & you're getting g12 gear, you would probably have the most fun going for JKLS. Why not look at JKLS's requirements and see if you want to start that quest?