You could do a triples team and use both clefairy and clefable and have the team be extremely viable
I still have nightmares about this team
But there isn't VGC triples! My smogon overlords already hate me for not playing OU, I can't disrespect them any further!
I was planning to do Evolite Clefairy though, I like Friend Guard in Doubles.
You can try pairing a dual screener with Clefairy and give it an eject button to switch into a tank like Aegislash or something and set up while Clefairy helps protect it with heal pulse and lucky chant