Don't necessarily have to wait in jeuno, If you bring a warp scroll or sub BLM you can go farm, or skill up a weapon whilst you seek; (This kept me going through late 40s, early 50s) Skilling up in batallia downs can net you a fair few tiger fangs and such.
I did pretty much all my exping at that point in Quicksand Caves, but Garlaige Citadel (at the bottom of the stairs where Serket pops) should be good at your level too. At 50-52ish you can do Helm Beetles in CNest or Antica in QSC, then move onto Kuftal tunnel after that.
Just my experiences at that level, hope this helps.