Uncanny X-Storm

I've tried this deck several times over the years of the mutant waves. It got better and better every time a good new basic X-Men ally was released, but only really came into its own with Magneto's unbelievably good collection of Leadership X-Men allies.

Cyclops, Phoenix, M, and Kid Omega are instant adds to this deck, and all dramatically improve it.

Cyclops in particular is absolutely an incredible fit for Storm. Combined with Thunderstorm, each ally and identity in play is hitting for +2ATK on their basic, and Cyke also boosts attack events and abilities as well. War Machine? +1 for every Shoulder Cannon hit. Got a Gamora, Iron Man, or Nova at the table with a fist full of attack events? +1 damage for each, plus the aforementioned +2 on their basics.

This deck really sings in a 3-4 player game. Storm and Cyke (the ally) are two of the best-scaling effects in the game, where the more people the better their effect is. Cyke is almost always the first thing I grab with Cerebro after a reshuffle, and is definitely the finisher at the table. With him, Storm can easily throw 40+ damage down to finish off a villain.