Okay so I know I'm probably gonna get shit on by smogonfags. I KNOW Lucario has a better physical movepool. I KNOW as a Fighting type it's better suited as a physical sweeper. I just thought it'd be fun to try out a specially offensive set.

Anyway, so far the moveset I have for it is

-Nasty Plot
-Vacuum Wave (Vacuum Wave is a cool move)
-Dragon Pulse

What should I put into the last slot? I'm torn between Psychic, Dark Pulse, and Shadow Ball. I'm leaning towards Shadow Ball since it nails Psychic types and isn't resisted by Fighting types, but Psychic is tempting because it hits Fighting types super effectively and has a chance for dropping Special Defense, and Dark Pulse has a flinch chance. I was also entertaining Flash Cannon since it gets STAB but it has shitty coverage so

What do you guys think?