Genin go from 7.5% Defense (ie. practically NOTHING) to over 30% Defense (ie. useful levels that allow them to live). Start tossing in things like Maneuvers (enhanced for Defense) and Grant Invisibility (enhanced for Defense) and you can start getting really close to the Defense Softcap of 45% (ie. where you WANT them to be).
Mind you, this sort of question is a bit like asking how much help an Empathy Defender would be to a team that needs a healer.
It's the end. But the moment has been prepared for ...
Mainly my question is how big a help would FF do for Ninjas. I remember hearing that they have inherent defense, but I don't know how much excatly.