I was able to clear this room with the hints here, but
Click here to view the secret text
×apparently it's possible without decoys.
So in trying to do that, this is as far as I've gotten:
Click here to view the secret text
×
Dead golems on the 1s, with a rock-pile on the lower-left of them. I can manipulate the remaining giant to be on either the left or right side of the obstacles in the middle. But I can't manipulate it to get above me from there, and also I'm not sure if I can kill a golem in the top row either even if I do manage that.
Any advice?