Those are my favorites, in order of my levels at the time. What are yours ?

1) Lhusu Mines (skeletons)

2) Nam Yensa Sandsea - Simoons Bluff (Bagoly, Axelbeak)

3) Ozmone Plains (Sleipnir, Behemoth)

4) Paramina Rift (skeletons, Twintania, Slaven)

5) Stillshrine of Mirian (skeletons, bats drop teeth at $$$$)

6) Mosphoran Highwaste (Wolf's blood)

7) Feywood (Mirror Knight)

8) Giruvegan (Behemoth, Vivian)

For leveling up without gil there are better places but I cba to level up on the cheap