For the record, Lucario does not get Mach Punch, I wish it did, but unfortunately it does not. You're probably thinking of Mach Punch's Special equivalent, Vacuum Wave, which Lucario does have access to, though I suppose that is a benefit in itself, as Vacuum Wave is the only Special Priority move, so Special Sets can use that. Though I do agree that with Justified and Lucarionite, Physically-Oriented Mega Lucario is the closest way of punishing mindless Knock Off Spam, though it would've made life easier if Steel hadn't lost it's resistance to Dark, but I digress, everything else on your post I can agree with.
Originally Posted by Black Murder Heavangelon
I'm just going to apologize for my future self if I say anything stupid or offensive.