With the Paladin’s Z attack (Sacred Executioner), it should say "Use the Piety meter to “strengthen” your sword, not “strength”.
Also, under the Sword of Justice skill and in the 1st branch called Enhanced Strike, it says changes to casting mode. It should also include in parenthesis what the cast time would be (2 sec). That way we know how much we’re sacrificing by making it a casting skill.
Thanks for your time. Hope this helps make the game even just a tad better