First VGC 2018 Team

Looking for comments and suggestion for my first set of VGC teams I plan of using for the upcoming new format:

Landorus-Therian @ Assault Vest
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- U-turn
- Rock Slide
- Knock Off

Cresselia @ Leftovers
Ability: Levitate
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Psychic
- Icy Wind
- Helping Hand
- Moonlight

Tapu Fini @ Wiki Berry
Ability: Misty Surge
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Muddy Water
- Moonblast
- Icy Wind
- Calm Mind

Zapdos @ Misty Seed
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Heat Wave
- Tailwind
- Protect

Aegislash @ Ghostium Z
Ability: Stance Change
EVs: 252 HP / 4 Def / 252 SpA
Modest Nature
- Shadow Ball
- Flash Cannon
- King's Shield
- Wide Guard

Kangaskhan @ Kangaskhanite
Ability: Scrappy
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Fake Out
- Return
- Sucker Punch
- Drain Punch

I highly appreciate the suggestions, thanks!