Which assassin can kill these Avengers with less prep ?

You're given the task to assassinate this team of Avengers :
Captain America , Black Panther , Black Widow , Hawkeye , Falcon & Iron Man .

You can choose any hero/villain from any universe that can assassinate this team but he should do it with the less prep. time .

Though in his prep. he'll have infinite ressources .

Morals on to everyone in the final fight .

Without Thor and Hulk it's easier . . . But I would choose . . . And I know this is cliche and overkill . . . But doomsday . . . Otherwise Thor since he's missing and allowed

Solid Snake

Any Forgotten Realms Archmage,

Ninjak with almost no prep.

Thanks for reading,
Floopay

Slade

Deathstroke, Punisher, Cable, Red Hood

Deathstroke

Dradpool or ozymandias

Saint of Killers, and he doesn't need prep.

Big Boss, Sam Fisher, or Darth Maul.

lobo

The Knight Commander from the PS4 game "The Order 1886". I'd have him prep the weapons and take them each out 1 by one starting with tony. My choice is an Elder, that's a Lycan that can transform at will, though they do not look like traditional werewolves. I'd ambush tony after a party in my lycan form and kill him swiftly before he could react and then dash. Black Panther would be the 2nd hardest imo due to his suit and tech, so i'd wait to catch him when he wasn't in it and ambush him with the Arc Gun (a lightning gun from the game) and all the firepower I could, quickly. Next would be Falcon, and i'd try and hit one of his wings while he was flying and then blitz hard and fast. The pattern would continue on like that. I'd rely on being a hard hit and run assassin. No prolonged battles at all and i'd try and kill some while they were sleeping as well.

Deadpool could probably kill them all

Deathstroke. He's perfectly suited to take each and everyone of them out, and he's actually likely to succeed without drawing an insane amount of attention.

Cole Mcgrath.