DE Sidious is sitting in his chambers where he had his duel with Mace. You can make any group you want, with whichever Star Wars characters you want but in the end they aren't powerful enough to take on Sidious. And since there is a notion for a limit at four, let's make it that way.
The person who has the strongest group out of the others wins.
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
Does Palpatine have access to his full palette of powers? If so its near impossible for a team to beat him, drain, his speed, and lightning would overwhelm most combatants immediately.
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk