is my 5th gen Uber tiered team any good?

Question

Arceus-Groun (Arceus-Ground) @ Earth Plate
Trait: Multitype
EVs: 144 HP / 252 SAtk / 112 Spd
Modest Nature (+SAtk, -Atk)
- Judgment
- Spacial Rend
- Overheat
- Shadow Ball

Giratina @ Dragon Fang
Trait: Telepathy
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Shadow Force
- Draco Meteor
- Destiny Bond
- Thunderbolt

Thundurus (M) @ Zap Plate
Trait: Prankster
EVs: 88 HP / 252 Atk / 168 Spd
Adamant Nature (+Atk, -SAtk)
- Wild Charge
- Bulk Up
- Brick Break
- Substitute

Ho-Oh @ Charcoal
Trait: Regenerator
EVs: 252 Atk / 128 Def / 128 SDef
Adamant Nature (+Atk, -SAtk)
- Sacred Fire
- Brave Bird
- Return
- Earthquake

Excadrill (M) @ Flame Orb
Trait: Mold Breaker
EVs: 168 HP / 252 Atk / 88 Spd
Adamant Nature (+Atk, -SAtk)
- Shadow Claw
- Slash
- Focus Blast
- Facade

Darkrai @ Choice Specs
Trait: Bad Dreams
EVs: 116 HP / 140 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Nightmare
- Dark Void
- Roar of Time
- Dark Pulse

Comments

Darkrai:Switch Roar of Time out for Spacial Rend because while you're recharging, the opponet might wake up, and one hit just OHKO you, And switch Nightmare out for Dream Eater for heals. And how does choice specs work? If you use Dark Void, you just spam it. Do you plan on wasting two turns of the opponet asleep for a simple 50% special attack boost? No, give him Leftovers or something else.