Avenging Executioner

[AtomicKitKat]

Just a quick observation. Is the Avenging Executioner basically just a distilled Ghost-faced Killer? :D

[Person_Man]

Yes. And while it's a fairly good PrC at ECL 6-10ish, as you get to higher levels more and more creatures are immune to Sudden Strike and/or Fear. Thus I would not suggest using it unless you're in a low level campaign that does not see a lot of undead, etc.

[Starbuck_II]

Just a quick observation. Is the Avenging Executioner basically just a distilled Ghost-faced Killer? :D

No, it is better. Much better.
You need to pump fear effects though.
Good Feats:
Frightful Presence: (requires Intimidate 9) When you charge or attack, all enemies within 30 ft who have fewer HD than you must roll will save.. Will save DC 10 + ½ character lv + Cha (), if fail shaken 1d6 + Cha mod rounds. Successful save means immune for 24 hr. Can’t affect dragons or Creatures with Int 3 or lower.
Imperious Command: Demoralized opponent cowers for 1 round, then shaken for 1 round.

Save reducers help too like Hexblade (dark companion, curse), Paladin of Tyranny, et cetera.

[AtomicKitKat]

Nod, like I said, distilled GFK. Same gimmick, but improved(and concentrated into 5 levels instead of 10). Coupled with "shaken now counts as flat-footed/no Dex! FREE SS/SA!".