I'm in my 50 card deck phase right now.

There's a bit of card swap/options here - notice there's no card for Forge to pull out - heres the deal -

its Forge & X-Bunker

or

Sunfire & Helicarrier or X-Bunker

it just depends on who you're facing and what you think is best but both work really well.

This deck at 50 cards works well with Domino especially against Ultron.

Get all 3 Pulse Grenade down to exhaust for the Firepower, Fusillade & Mean Swing events.

Tutor Sidearm & SHIELD sidearm with Deathlok & Deathlok for even more weapon upgrades to exhaust for the events.

once you've got Weapon X & The Painted Lady down you need to prioritize flipping down as often as possible - weapon X generates two cards if you tuck under painted lady - always tuck the first card you discard in case the 2nd is identity specific - Hold on to your Pulse Grenades until the final push - just rack them up to exhaust for your events and only use them if you would lose without using them at that time. do not use the Pulse Grenades until the very end to finish the villian.

Psylocke is a must play as she will allow multiple flips to alter-ego.

Defend and soak as much damage with Domino as possible - do not chump block with allies unless you absolutely have to to avoid losing the game. 100% do chump block with Professor X tho - remember - Jackpot! is not a forced response and you can put it under The Painted Lady to have a huge alter-ego turn by:

1 -using it as a resource then 2 - swapping a card for it from the top of the discard pile and then 3 - using it as a resource again then 4 - putting it back on top of your deck with Pip the Pug and
5 - recover for... 6

This Deck does alot of damage and you burn so many cards that its fine to have the extras because it slows down that extra encounter card when you deck out. dont be scared - domino tutors really well with pip, painted lady & weapon x - if you can flip down, flip down - once youve got the alter-ego engine built your next turn when you flip back to hero form will be huge.