Just a minor nitpick, but I see little reason for the Nasty Plot set to run Justified over Steadfast or Inner Focus. The Attack boost does nothing for it, while the potential Speed boost from Steadfast or flinching immunity from Inner Focus could come in handy against something like Togekiss.
Honestly, none of its abilities really matter (except that Inner Focus beats Fake Out Kangaskhan), but if Nasty Plot Lucario switches in on a Dark move, Justified potentially tricks your opponent into thinking that you're running the physical variant. If he doesn't see Justified, your opponent would be more inclined to suspect the special variant.