Defense skill...

[Axlrose]

I like to keep Excel spread sheets of my various character's stats, along with using formulas to tell me what the maximum amount per level. Not that I am a min-max person - I just like to keep stats! I started a bit into all my character's life and since they are in the low teens (or lower), I can "test" various formulas for accuracy.

For the cloth casters, it appeared for their Defense skill up to level 10:

Defense(max) = ((level x 4) + 5)

since my three casters had Defense = 45 at level 10. But from what I have gathered since a few have experienced into higher levels, the Defense skill drops to three points per level gain. That is, level 11 = 48, level 12 = 51, level 13 = 54, level 14 = 57. But since the maximum of all maximum is 145, three per level does not evenly divide into (145 - 45) = 100.

Anybody have any insight, especially at higher levels? Does it reach a point to dropping to two points per level, down to one?

Thanks for any information!