Pick 3
My team consists of The Incredible Hulk, Professor X, and Dr. Doom. I figure I have good balance, but what the heck do I know?
You need to pick 3 others that will at worst stalemate my team, or possibly beat them. By the time, you will have read this, my team is already invading your 3 person castle. Mind you, that they have had some prep time, as everyone usually does prior to an invasion.
Craassshhh! There goes one of your windows.
Put up your defense! Quickly!....before I secure another castle and put my 3 person flag on your roof!
Go! Go! Go! Hurry up! Hulk almost has a grip on your throat, and Doom is pulling something out of his bag o' tricks, with Xavier right behind him.
(Oh, and uh, no one including Thanos and above is permitted to play)