I'm at the part where I have to kill the 3 demons; I can't find Doomion. Where is he and how do you get to him. Also, if anyone could provide a good map I'd appreciate it.

south west corner of the 'maze'

 

 

 

You go from the wtiches house to the west then south

 

 

 

The three demons are in a line on 3 consecutive platforms than lead to the chest

There is a map on tipit that helped me a lot.