Divine Fire
So I'm plugging away at the burning one for an upcoming September release when I read that it has divine fire as an ability.  Divine fire as it is written is set up like flame strike in that 1/2 the damage is fire and 1/2 is from a divine source that can't be reduced.

Which is easy enough to translate over... however I was wondering what people thought of upgrading divine fire so that...

All damage is considered to be from a divine source and cannot be reduced except by spells cast by divine casters that reduce fire damage. 

Potentially this increase damage to heroes but also helps strengthen the dwindling barrier that exists between arcane and divine casters.