What runs do you guys do and what is the least money you get from one?
Well money is relative to your paragon level and additional gold find.
My Act 3 run:
Start the second heart quest.
1) Keep level 3. When you see the exit to level 2, go in just to have it marked on your map, go back and finish the rest of level 3.
2) Tower of damned level 1.
3) Tower of cursed level 1 and finish the rest of the act.
4) Tower of cursed level 1 way point, then go up to crater level 2 and work your way to the entrance.
5) Rakkis crossing, go backward to field of slaughter and do one big circle there.
6) Keep level 1 way point, go straight to level 2 and work your way to the exit.
First part of the run is to get to 5 stack as quick as possible and get lots of rares from the elites and bosses. Second part of the run is to clear the 3 most enemy concentrated areas for loads of xp.