This is by far the easiest and safest method I've found to quickly farm Iron Golems. Iron Golems are notorious for their insane defense and relatively high hit points. Using this method (which features the Kaiser Knuckles and the Imp soul in particular) you can defeat 4-5 of them per minute. Also, even though it's not shown in the video, if you stand where the stairs meet the floor on either side of the room, the Iron Golem can't attack you, but its back foot will draw back enough where you can attack it if following the Golem around in the middle of the room seems too dangerous.
![](https://i.ytimg.com/vi/UDKGA2USgTM/maxresdefault.jpg)