Here are some best Mirror Decks:
Archer Queen Ram Rider Deck
Bowler
Ice Spirit
Inferno Tower
Mega Minion
Mirror
Ram Rider
Skeletons
Giant Snowball
Avg. Elixir
2.9
Royal Ghost Magic Archer Deck
Minion Horde
Fireball
Furnace
Mirror
Skeleton Army
Goblin Barrel
The Log
Princess
Avg. Elixir
3.1
Mega Knight Miner Poison Deck
Goblin Barrel
Cannon
Dart Goblin
Fire Spirit
The Log
Mighty Miner
Mirror
Rocket
Avg. Elixir
2.9
Royal Hogs Earthquake Deck
Archers
Electro Spirit
Fire Spirit
Ice Spirit
The Log
Mirror
Poison
Skeletons
Avg. Elixir
1.8
Giant Graveyard Freeze Deck
Arrows
Fireball
Freeze
Graveyard
Mirror
Musketeer
Tombstone
Valkyrie
Avg. Elixir
3.5
Lava Hound Balloon Deck
Arrows
Freeze
Graveyard
Hog Rider
Knight
Mirror
Tesla
Zap
Avg. Elixir
3.3
Goblin Giant Sparky Deck
Flying Machine
Furnace
Lightning
Mirror
Rocket
Tombstone
Electro Dragon
Electro Wizard
Avg. Elixir
4.1
Pekka Bridge Spam Deck
Arrows
Giant
Heal Spirit
Mega Minion
Mirror
Night Witch
Elixir Collector
Skeletons
Avg. Elixir
3
Mega Knight Miner Wall Breakers Deck
Arrows
Fireball
Fisherman
Magic Archer
Mirror
Mother Witch
Tombstone
Witch
Avg. Elixir
3.4
Royal Giant Fisherman Deck
Archers
Bandit
Bomb Tower
Royal Ghost
The Log
Miner
Mirror
Poison
Avg. Elixir
2.9
Hog Rider Earthquake Deck
Goblin Barrel
Giant Skeleton
Hunter
Mirror
Skeleton Army
Skeleton King
Sparky
Tornado
Avg. Elixir
3.8
Royal Ghost Magic Archer Variant Deck
Minion Horde
Fireball
Furnace
Mirror
Skeleton Army
Goblin Barrel
The Log
Dart Goblin
Avg. Elixir
3.1
Royal Hogs Lightning Deck
Archers
Arrows
Clone
Electro Spirit
Fire Spirit
Firecracker
Mirror
Poison
Avg. Elixir
2.4
Archer Queen Royal Hogs Deck
Arrows
Bowler
Electro Spirit
Goblin Hut
Golden Knight
The Log
Mirror
Skeletons
Avg. Elixir
2.6
Bandit Dark Prince Deck
Ice Golem
Fireball
Inferno Tower
Mirror
Goblin Barrel
The Log
Princess
Goblin Gang
Avg. Elixir
2.9
Archer Queen Royal Hogs Variant Deck
Bowler
Electro Spirit
Fire Spirit
Royal Ghost
Goblin Hut
The Log
Mirror
Skeletons
Avg. Elixir
2.3
Golden Knight Royal Hogs Deck
Three Musketeers
Royal Ghost
Golden Knight
Heal Spirit
The Log
Mirror
Elixir Collector
Elite Barbarians
Avg. Elixir
4
Dart Goblin
Electro Giant
Ice Wizard
Mini P.E.K.K.A
Mirror
Skeletons
Tornado
Zap
Avg. Elixir
3
Royal Ghost Magic Archer with Valkyrie Deck
Spear Goblins
Minion Horde
Fireball
Furnace
Mirror
Skeleton Army
Goblin Barrel
The Log
Avg. Elixir
3
Royal Ghost Earthquake Deck
Furnace
Rocket
Mirror
Tornado
Skeleton Army
Goblin Barrel
The Log
Executioner
Avg. Elixir
3.4
Miner Wall Breakers Deck
Ice Spirit
Miner
Mirror
Monk
Phoenix
Elixir Collector
Skeletons
Zap
Avg. Elixir
2.9
Miner Skeleton King Deck
Ice Spirit
Skeletons
Mirror
Rage
P.E.K.K.A
Heal Spirit
Goblin Curse
Goblin Machine
Avg. Elixir
2.5
Monk Archer Queen Deck
Boss Bandit
Dart Goblin
Ice Spirit
Mirror
Spear Goblins
Suspicious Bush
The Log
Wall Breakers
Avg. Elixir
2.4
Skeleton King Graveyard Deck
Bomber
Elixir Collector
Goblin Curse
Goblin Machine
Inferno Dragon
Mirror
Rage
Rune Giant
Avg. Elixir
3.4
Giant Skeleton Phoenix Deck
Arrows
Elixir Golem
Goblin Machine
Mirror
Rage
Skeleton King
Skeletons
Witch
Avg. Elixir
3
Phoenix Monk Deck
Battle Healer
Berserker
Electro Dragon
Elixir Collector
Elixir Golem
Ice Spirit
Mirror
Tornado
Avg. Elixir
3.1
Phoenix Graveyard Deck
Battle Healer
Electro Dragon
Elite Barbarians
Elixir Golem
Inferno Dragon
Mirror
Rage
Tornado
Avg. Elixir
3.6
The Mirror excels as used in the appropriate deck with cunning support and timing. Master this deck and rank up in ladder and challenges with ease.