help

[MarcWill]

The guy after Rahab, the one you have to pull the three poles out of to revive. How do you defeat this guy and on which plane material or spectral since he is on both?

[Azazel]

Material Realm,
This is from gamefaqs:
After the cutscene, lead Dumah back through the tunnel to the main courtyard. You must do this slowly, keeping Dumah within sight at all times, or else he will simply walk back to his throne room. The object is to get him into the furnace room, which is back through the large courtyard and on the other side through a tunnel. Once he is there, you must quickly turn on the gas and use the lever to kill him. Watch out for his stunning moves because he is almost sure to kill you in 2 hits. When he raises his fist in the air, quickly jump and glide to avoid the shockwave. All in all, he is a rather easy boss.