the moveset is fine; you can also consider RestTalk Kyogre to make it defensive
Item: Meadow Plate
EVs: 252 HP, 252 Speed, 4 Sp. Atk
~ Calm Mind
~ Earth Power/ Refresh
Judgement > Grass Knot. Grass Knot is usually used for coverage (and it's good in Ubers where everything is fat), but for Arceus, go with its trademark move. Refresh is an option to prolong its lifespan.
(Though, I would say that Arceus normal with Extremespeed will make mincemeat of the opposing team.)
Item: Choice Scarf
EVs: 252 Atk, 252 Speed, 4 HP
~ Bolt Strike/ Fusion Bolt
~ Dragon Claw
~ Volt Switch
I would suggest Zekrom in favour of Kingdra - you might as well get STAB electric moves, and Kyogre already has STAB water moves.
EVs: 252 Hp, 180 Def, 76 Speed
~ Stealth Rock
~ Rapid Spin
~ Volt Switch
Espeon is way too frail for Ubers. Get a rapid spinner instead to clear hazards, and I suggest Forrestress.
Item: Choice Band
EV: 252 Atk, 252 HP, 4 Sp. Def
~ Bug Bite
~ Bullet Punch
Scizor shouldn't be used to take a hit, it's there to sweep. If you want something to take an electric hit, go for either Zekrom or Giratina.
Item: Griseous Orb/ Leftovers
EVs: 252 HP, 252 Sp. Def, 8 Def
~ Sleep Talk
~ Dragon Tail
Giratina should be more of a wall, and go with altered forme. Another wall you can consider is Lugia with Multiscale.
It'll burn shuffle your opponent, and it can also be your anti-spinner.