Taking on anything with a higher level

[Corfish]

I'm finding it strange as I do this, but I'm managing to take on anything that is up to 2 levels higher, also doing a Lv25 levequest whilst on Lv24.
Also, I managed to complete CNJ hunting log rank 2 at lv19.

This is fairly standard depending on your class. Completing rank 2 Hunting marks by lvl 19 is pretty normal. Generally rank one is for 1 - 10, two is 11 - 20, etc. The lvling process is pretty easy in this game, which is good considering you have so many classes to lvl. Overall, anything on the world map is toned down compared to things in dungeons. FATEs are about the only exception, which fluctuate based on how many people it took to beat the FATE last time.