By raw I dontvthink you can. We have no deific obedience powers for demon lords.cut is easy to extrapolate from the demonic obedience powers but would only work for one of the prc. In the case of empyrean lords I think deific obedience works for one of the prc.
Appologies cannot remember all 3 prc names evangelist one other and a melee one. The "one other" is the easiest to apply the prc.