How about...

[Eilierie]

each time your run a quest you get an increase in drop rate on named items.

essentially in theory it is the same principle as 20th completion list, just a different implementation.

for example - 20th Shroud is 100% on certain items, so you know without a doubt you will eventually get what you want.

what it you've run EVON 68 times and still have only pulled 2 FRDS ? What if every time you completed EVON your chance of pulling a FRDS went up 1 % ? ( just pulled a number out of the air ) at least you would know that eventually you will get what you're after.

shooting from the hip here, no math was done in order to write this post and no more thought put into it than what is written - leaving it to be built up or torn down.

[Silverwren]

Don't we sort of kinda already have this almost?

I thought if you ran a chain three times you got all the named loot from that chain in your rewards list, or some such thing. Am I close?