I often suggest lazav, dimir mastermind Clone tribal type decks because it scales with the group power.
I find that in casual play groups it's just about having sufficient time to play the game and who wins isn't actually relevant as long as they don't win quickly. So sometimes if you are just naturally a spike you'll find yourself crushing people with the worst decks you can imagine. What you have to do is change your play style to match them. Your job becomes sort of Police, slow down whoever is winning, having good threat assessment is critical, just keep the game going until people have played their decks gambits (everyone has had a chance to win) then end it quickly.
I have an actually quite powerful and expensvie Glissa, the traitor deck but its slow and grindy so no one feels like they are getting crushed when they play against it.
I find that in casual play groups it's just about having sufficient time to play the game and who wins isn't actually relevant as long as they don't win quickly. So sometimes if you are just naturally a spike you'll find yourself crushing people with the worst decks you can imagine. What you have to do is change your play style to match them. Your job becomes sort of Police, slow down whoever is winning, having good threat assessment is critical, just keep the game going until people have played their decks gambits (everyone has had a chance to win) then end it quickly.
I have an actually quite powerful and expensvie Glissa, the traitor deck but its slow and grindy so no one feels like they are getting crushed when they play against it.
Pioneer:UR Pheonix
Modern:U Mono U Tron
EDH
GB Glissa, the traitor: Army of Cans
UW Dragonlord Ojutai: Dragonlord NOjutai
UWGDerevi, Empyrial Tactician "you cannot fight the storm"
R Zirilan of the claw. The solution to every problem is dragons
UB Etrata, the Silencer Cloning assassination
Peasant cube: Cards I own