How much does it improve my Defense? I can't tell if it makes a difference or not. Apparently it's supposed to lower my damage received by 20%, but I've had a hard time verifying that. I can't tell that it lowers the number of times I get hit, either. If it raises my Defense score, it should lower the chance of getting hit, right?

How much does it increase my Defense score? How much of an effect should I expect? If it only increases my Def by my level, then it's not worth it, but if it's supposed to raise my Defense by 5*level, then it is probably worth using in a lot of situations when I'm out solo, but I'm certainly not seeing the effect of what I would expect from that much of a Defense bump up.

How much does Dodge do?