Jungle area isn't that great for training imo, because the maps are too spaced out, and the mobs do a crapton of damage. This is coming from a sword knight. ~_~ You've got quests you can do there, and that's about it.
Unless this is a solo guide, by 68~70, if you can get a few higher leveled friends to party with you, you can tackle liliput navies.
And from 60-65, crabs, then sea stars. Earlier, depending on the class.