Quote Originally Posted by Sandpark View Post
http://na.finalfantasyxiv.com/lodest.../blog/3001254/

11-20: +2
21-30: +5
31-40: +8
41-50: +12

Regardless of the minimum, you don't get the weapon unless you complete floor 50 boss with 30 weapon and 30 armor. Defeating Edda last boss gives one aether upgrade if you at 29/30 or 30/29.
"I have completed PotD a number of times and have maxed my gear stats for turn in. I usually do this after completing level 50."