Got infinite in Phoenix season with this version of Mr. Negative. I have always liked this archetype, but never been sold on Jane Foster. My assumption being that most people leave after Mr. Negative into Jane Foster. Apparently, many people still stay in. Found this decklist from a tournament.
This deck has a tiny package of cards that you want flipped: Iron Man, Mystique, Knull and Arnim Zola. Zabu, Jane and Magik allow you to get more of those cards by providing extra draws. Sunspot, Yondu and Bast play support and empty your hand before playing Jane. A problem Negative Jane decks run into is that the hand becomes clogged, either by expensive cards or by running too many 0-power cards.
Backup line when not playing negative is Magik -> Knull -> Mystique + Shang-Chi.
Usually Negative + either Bast, Zabu or Jane is a snap. Retreat if your opponent snaps and you don't have Mr. Negative at all.
ETA: Climbed to infinite with the list before Magik was buffed. Should be better now.