Levels 1-5: South Gustaberg

Start out by killing Huge Horners and Tunnel Worms outside Bastok. When you reach lvl 3-4, you can start killing Young/Amesthyst/Amber Quadavs, Stone Eaters, Vultures, Strolling Saplings and some Rock Lizards. At lvl 6, move onto the first level of Vomp Hill in South Gustaberg and kill Ornery Sheep, Stone Eaters, Goblin Thugs, Goblin Weavers, and Maneating Hornets

Levels 6-8: Vomp Hill

At lvl 6, move onto the first level of Vomp Hill in South Gustaberg and kill Ornery Sheep, Stone Eaters, Goblin Thugs, Goblin Weavers, and Maneating Hornets. At lvl 8, move up to the second lvl of Vomp Hill where strong sheep and gobs can be found.

Level 9: The Furmaroles (South Gustaberg)

In this area just to the east of the entrance to the Dangruf Wadi, kill Land Crabs, Maneating hornets, Gobs, Quadavs, and Lizards.

Level 10-12: Palborough Mines (NE Corner, North Gustaberg)

I've found this area to be a great place to solo up to lvl 12. Stay on the first and second floor and kill Quadavs. There will be a lot of them on the second floor that will con Decent Challenge, but do not go up to the third floor as the Greater and Onyx quadavs will rip you to pieces.

Level 13-17: Valkurm Dunes (North Gustaberg > Konschtat Highlands)

At this point, its best to stop soloing and start looking for groups in the dunes. At lvls 12-13 kill Lizards in the first area of the dunes before the tunnel. At lvls 13-14 you can start killing some of the weaker gobs. at lvl 15, set up camp near selbina and kill Snippers and weaker gobs. At lvls 16-17 start killing the stronger gobs and damselflies. at 18 kill beach pugils and gobs. you can kill pugils and gobs all the way to lvl 20if you choose to, but there is a better place to get to 20..

Level 18-20: Korroloka Tunnel (Bastok Mines > Zeruhn Mines)

If you can find a party for the tunnel, it is a great place to lvl to 20. Just attack every Land Worm you see, but becareful because they do link which can be deadly. Its possible to lvl here past 20 if you solo, but it becomes a very slow process.

Level 20-26: Qufim Island/Delkfutts Tower (Port Jeuno)

This is the place to be to lvl your early 20s character. Start by killing Land Worms and Clippers, then move on to Greater Pugils. At lvl 24 you can start killing gobs inside the tower for good xp.

Level 26-32: Kazham (Take airship from Port Jeuno [Talk to Galka in departures room for quest to get airpass])

Getting to kazham can be a pain, but its worth the effort. Start by killing Yhutunga Mandragoras until you get to around lvl 28 then you can safely kill Goblin Smithies. At 29 you'll have to start moving out further into the jungle to find good xp. This means Yhoator Jungle. Start by killing Yhoator Mandragoras near the zone line. Once you hit the low 30s you can move on to Goblin Smithies and Lizards.

Level 33-35: Garlaige Citadel (Port Jeuno > Sauromugue Champaign)

In the citadel you can kill Bats and Beetles, but be careful because the Beetles aggro.

Level 36 and 40: Crawlers Nest (Rolanberry Fields)

Ah, the Crawlers Nest. grow to like this place because you will be doing quite a bit of lvling here. Start by killing Worker Crawlers in the first areas of the nest, then around lvl 36-37 move further in and down the cliff and kill Worker Crawlers there, but becareful of the maze lizards, they are VERY strong and link so i misdirected spell could wipe out your entire party very quickly. At 39 you can even further into the nest and kill Nest Beetles all the way to lvl 40 and higher.

Level 40+ :Crawlers Nest

It is my understanding that the nest is the best place to level all the way up to the low 50s other places to consider are the Quicksands Caves in the Altepa region, or going back to Garlaige and killing the stronger mobs there.