For anyone else struggling with Righteous Riposte, I modded the game to ensure that every riposte becomes a "Righteous Riposte" (useful for obtaining "Power Unleashed" Achievement).
All you need to do is to riposte the enemy attack and it will turn it in to a righteous riposte (no need to press attack again).

Installation
=========
1) Extract the compressed mod file (Assembly-CSharp.dll) using winrar or 7zip.
2) Make a backup of "GAME_INSTALL_FOLDER/Blasphemous_Data/Managed/Assembly-CSharp.dll" and replace it with the attached file.
3) To restore original behavior, restore the original file.