Current Winfinite is Scarlet Witch, Grey Suit Black Widow, and Professor X. It's important that Professor X is a low enough level that GSBW's purple is the strongest color on the team. The goal for this team is to get purple fast, which Scarlet Witch helps with her Arcane Incarnation. When it goes off, it makes purple, and if you're lucky, it'll make a Match 5. A Match 5'll activate PX's Master Plan, doing good damage and also generating 4 MORE purple AP.
So when you got enough purple AP for Deceptive Tactics, you can use the 6 (!) green tiles Black Widow can place, and usually set up two separate Match 5s, activating Master Plan twice, and generating 8 purple AP. And since Black Widow needs 11 AP for Deceptive Tactics, well. It's pretty likely she'll be able to do it again soon, nigh infinitely. Hence, Winfinite.
