Suggestion: The Spiderman is the most replaceable card here, any of the suggestions can work.
Substitutions: Instead Zabu try Daredevil and a 5 drop (instead Spider-Man) like Gamora.
This took me from 90 to 100 very fast ( first week of Modok season ), at 3K CL at the time.
Main goal of this deck is be winning 2 locations, then Aero them on the 3rd one on T6.
We accomplish this with tempo cards like Swarm, Lizard, and Maximus the great.
This is easy cubes versus decks that don't clog their own board with many cards.
If they fill their board, we still have tempo and some control, and a chance.
The Shang Chi & Spider-Man & Cosmo help control the big bad decks.
Zabu is simply a good inclusion, White Queen on T3 is too good.
There are often many lines with this deck, you need to plan ahead as soon as possible.
Movement version of this: https://snap.fan/decks/218772/