Quote (murfried @ Feb 26 2014 05:04pm)
Im quoting d2jomblified from the "ladder reset strategies"
"The best amount of magic find for any character is 300-450 magic find. If you go above 450, you will find more magic items then rare/uniques."

Seeing as that is wrong I don't know if that's a good tip.
There are mf break points for normal monsters and uniques. The formula is (250*MF)/(250+MF) and is rounded down.
I made a post about this somewhere not long ago but I cannot remember where

It's another story for act bosses tho, but that's not what we are farming here

EDIT: To be successful in level 85 areas you want a solid map seed. That is a pretty short level 85 area map with a lot of boss/champions backs. In terms of mf you want as much as possible paralelled with killing speed. You also want to kill boss/champ packs only, not the other monsters. I would even skip minions if I could lower the amount of time a run takes

EDIT2: Best "guide" I can find without too many details:
http://www.youtube.com/watch?v=TqZq9RgzMP0This post was edited by sebhehe on Feb 26 2014 10:13am