Depends largely on party size, feel free to take on the harder ones with bigger parties. The town here also gives quests with huge exp bonuses for the enemies.
Beware though, the mobs here have tons of hp!
Mountain pigs from 35-45
Super pigs from 40-50
Moss Men from 45-55. Kill the Harpie here while you're at it for the quest. :P
Just moved on to Toad Mountain:
Miss Flowers from 65 - 75
Avatar by LaTale.