Leaf Blade or Night Slash or Both for my Gallade?

Question

I am playing Platinum casually, but I don't know which move I want to teach my Gallade for extra coverage.
Here is his move-set currently. I plan on deleting Double Team for whichever move I pick, but should I delete another move to have both night slash and leaf blade?

Gallade:
Swords Dance
Psycho Cut
Close Combat
Double Team

Here is the rest of my teams moves for reference:

Garchomp:
Earthquake
Crunch
Dragon Claw
Iron Head

Gardevoir:
Psychic
Thunderbolt
Shadow Ball
Calm Mind

Rapidash:
Flare Blitz
Megahorn
Bounce
Fire Blast

Staraptor:
Brave Bird
Close Combat
Fly
Roost

Empoleon:
Flash Cannon
Surf
Hydro Pump
Ice Beam

Comments

I'm guessing night slash would be better, because none of your Pokemon have a STAB attack strong against psychic.
Also how did you get an iron head Garchomp? Did you already defeat Cynthia?

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Night slash so you have stab and you should run life orb

Answer 1

Assuming you haven't already defeated Cynthia, you should use night slash to make Lucian easier to defeat. Leaf blade is good against Bertha, but you already have Empoleon for that.