The Final Damage is not increased by the percentage of Def.
#Ability bug
mint gate
dim arrow
It's not final damage % that's increased, but flat final damage.
Which is to say, since you have about 7000 DEF, then every line of damage you do will be 3150 (45% of 7000) higher than it used to be.
So for example if you normally hit 10,000,000 per line, with this inner ability you will hit 10,003,150 per line.
tl;dr: Useless IA. Reroll.
mint gate
It's not final damage % that's increased, but flat final damage.
Which is to say...
I understand where you're coming from trying to help. I'm trying to get the devs to update/remove the line by addressing it as a bug.
It's ambiguous and needs to be better defined, especially since cirulcators can be purchased with cash.