Some questions

[GM-Pandora]

He might be able to pull off playing with only iro, as long as he doesnt go to the newest places. But usually sakray is recommended.

Hunter can level well in many places, it's a pretty versatile class. For the first few levels Soil is still great. Then you can try seal, or anolian, and rachel sanc is still decent. I leveled a bit at odin its great base exp, but you need to have mastered trapping to survive there ^_^