Here's my Togekiss I used for the VGC last year:
Togekiss@Sitrus Berry
Quiet Nature
Ability: Serene Grace
Ivs: 31/0/31/31/31/0
Evs: 252HP/252SpeAtk/6Def
-Air Slash
-Heat Wave
-Aura Sphere
-Follow Me
In tandem with Helping Hand Dusclops, it was the perfect pair to start off a Trick Room team. Follow Me not only helps resolve Trick Room, but also redirects one of Dusclops' two weaknesses in Ghost for no damage. The Follow Me also helps when Trick Room isn't up by making sure your partner is safely able to resolve their super powerful attack. Because you don't have to invest speed in Trick Room Pokemon, you not only get more powerful Pokemon with very good defenses, you get to further invest in this trait. Air Slash is also incredible if you can go first, which is why Trick Room is great with a slowed down Togekiss.