>>46498965This is actually pretty easy anon.
Ledian's only good stat is special defense, and she gets some great support moves. You're going to be using her as a setup mon in Singles or support in Doubles.
-Light Screen, Reflect, Safefguard, Tailwind, Defog, Encore
-Baton Pass, Swords Dance, Agility
If you give it attacking moves, U-Turn, Infestation, and Mach Punch are probably the only ones worth considering. Maybe Counter if you run Focus Sash and get a bad matchup.