Help with my OU team!

Question

TEAM:

Mienshao (M) @ King's Rock (Fling set)
Ability: Regenerator
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Acrobatics
- High Jump Kick
- U-turn
- Fling

Mew @ Heat Rock (Sun set)
Ability: Synchronize
Shiny: Yes
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Synthesis
- Sunny Day
- Solar Beam
- Flamethrower

Manaphy @ Damp Rock (Rain set)
Ability: Hydration
EVs: 216 HP / 196 Def / 96 SpD
Calm Nature
- Rest
- Rain Dance
- Scald
- Dazzling Gleam

Sudowoodo (M) @ Custap Berry (Custap-Berry rock setter)
Ability: Sturdy
EVs: 252 Atk / 252 Spe
Lonely Nature
IVs: 0 HP / 0 Def / 0 SpA / 0 SpD
- Stealth Rock
- Explosion
- Earthquake
- Hammer Arm

Virizion @ Choice Scarf (Sweeper)
Ability: Justified
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Sacred Sword
- Leaf Blade
- Stone Edge
- Zen Headbutt

Victini @ Leftovers (Trick Room set)
Ability: Victory Star
EVs: 252 HP / 248 Def / 8 SpD
Sassy Nature
IVs: 0 Spe
- V-create
- Trick Room
- Bolt Strike
- Zen Headbutt

I win about half the time with this team, but I want it to be better.

Comments

At base 100 speed, Victini can't get very slow. Might as well just run the standard set. Besides, trick room will hurt the rest of your team.
Sudowoodo: Replace earthquake or hammer arm with stone edge. Because of STAB, it does much more damage.
Mienshao: Replace king's rock with life orb, replace fling with knock off, replace acrobatics with poison jab.
Mew: I have no idea why you're using a sun set. Something like iron defense/amnesia/roost/psychic would be much better.