Prolly better to just go to china or ghost isle. (that way you have chang'an or japan for your spawn point)

Ghostship is hard to find at times because it travels around between Sky City and Australia. So its often a waste of feul traveling around unless you know what you are looking for or wait for it to come to you. So i suggest ghost Isle. I think they may drop the same items. The ghosts are on the second floor, skeletons on the fisrt. There is also less spawns in ghost isle than ghost ship. They also debuff so it can be dangerous aswell incase you get terra'd or mess'd.

=3 good luck with your training if you have any other questions be sure to ask. (⌒▽⌒)