A few nights ago 4 of us were farming act 2 goblins. We had 240%-270% magic find and were getting 1 goblin every 30 seconds or so, often with 2 rares and sometimes 3.
However we need a bigger group.
If you're interested you need to have decent dps, 240% mf and a gear swapper (zoom hack makes finding the goblins much faster)
Gear swap:
http://www.ownedcore.com/forums/diab...-swap-bot.html
Zoom hack and track (I only use zoom hack):
http://www.ownedcore.com/forums/diab...zoom-hack.html
Don't forget to rep them if you like the programs!
OK NEW MF requirement: 240%. this shouldn't be a problem if you use gear swap as you can find near max mf gear for a reasonable price.