Cheers thanks for the reply. Yeah, I'm the GM and bought this product pretty early after release. I'm very happy with the product so far. We've just finished chapter 2 this week with the heroes making a heroic stance against the demon of gluttony.
On a side note - I found the harp version of a class IV demon extremely overpowered. According the the HARP monsters book. They have an ability called "soulburn" which a demon can use a certain amount of times per day equal to their constitution bonus. For this specific demon which have a good enough OB to hit the characters often will be able to use the ability after every hit.
The soulburn ability drains 2d10 constitution + 10x that hitpoints if the character fails a stamina RR(160). It basically means instant death for characters at level 7-8 in harp.
I would suggest that the soulburn ability is either nerfed or removed from demons in EoH - it's simply too deadly.