hello
I'm going to recommend decuideye as the main sweeper of the team. While he doesn't do enough damage on his own, weakness policy deciudeye does a lot. Also, phantom force feels like kind of a waste seeing as how decuidye already has a ghost move, use shadow sneak instead.
Pelipper is kind of a waste of a pokemon. Not enough pokemon benefit from its rain, just having dracovish use it is definitely a waste. I'd recommend talonflame instead, he can activate the weakness policy, and talonflame has the gale wings for tailwind, which is super valuable in the metagame.
Talonflame @ Saftey Goggles
Ability: Gale Wings
EVs: 4 HP/252 Atk/252 Spe
-Ember
-Tailwind
-Brave Bird
-Taunt
Tailwind for speed, a perfect fit because the team is only moderately fast, ember for the weakness policy, flare blitz and brave bird for damage.
Alakazam definitely does not have enough bulk for a screen setter, so I'm going to recommend grimmsnarl instead:
Grimmsnarl @ Light Clay
Ability: Prankster
EVs:252 HP/24 SpD/12 Spe
Careful Nature
-Taunt
-Spirit Break
-Light Screen
-Reflect
Spirit Break lower special attack and does damage, taunt for trick room teams and other stuff. Keep in mind that his screens and taunt have prioirty thanks to prankster.
Stage hazards are useless in VGC, and steel beam has too much recoil to be useful. Run flash cannon and thunderbolt instead, and give him assault vest.
Extinct fish should get rid of protect. When choiced, you definitely don't want to be locked into protect. Run rock slide instead, and I also recommend crunch over earthquake.
Sylveon is pretty good. However, run mystical fire over moonblast as hyper voice both overpowers Moonblast and hits both enemies. Yawn over fake tears because the sleep is nice.
[Pokepaste][1]
Hope I helped!
[1]: https://pokepast.es/308bac481497c7c4
