Monsters:
Big monster (Zombrya the Dark, gene warped werewolf, etc.)
Spell:
Deck Lockdown
Acid Rain
Prohibition
Trap:
Mind Crush
Pulling the Rug
Deck Devastation Virus (this card is so sick when you pull it off on them)
Magic Drain
Malevolent Catastrophe (surprisingly, this card is amazing against gadgets, kills oppression, shrinks, dimensional pris.)
Please post if you have any more ideas or suggestions