>>51160884Ledian is weak in a direct fight because it's a big team player mon. It has 2 effective sets in Screens and U-Turning and Baton Pass set up.
Ledian learns both Light Screen and Reflect naturally, and U-Turn by TM. This set revolves around setting up screens of the appropriate type, and pivoting to a mon that can set-up on the opponent now that screens are up.
Ledian learns both Agility and Baton Pass naturally, and Swords Dance by TM. This set revolves around Ledian itself being the set up, using it's high Special Defense to set up on special attackers and then passing off to a mon that is now a sweeper.
Its a piss-poor direct attacker, but as part of a team it's way better, setting up combos for it's teammates to take advantage of.