[Vinen]

This is one of the areas I feel Vanguard had right...

Why not just set equ values on every item that scales up and down based on the level of the item vs the level of the player?

Say
20% = Legendary
...
10% = Rare

Or different slots could have different values for each quality of an item and so forth.

This could also be used in nifty ways such as in events, etc that may force a player to only use a limited amount of Expertise. AA or something could allow the player to go above the start 100%.