Is this an ok team? Or is there no synergy there?
I’ll tell you where the synergy is lacking… It is between you and the forum. There is a team building thread for a reason… That is some low tier stuff right there.
They all work well with drones. Good ground based rushing potential. But how are you going to deal with opponents who can fight well from the air? All three of your characters struggle with that aspect. Anyway before you go changing your team I suggest trying to take the Japanese approach in Marvel. Make your team work somehow. Don’t go choosing high tiers just because they are high tier. You can’t win every fight but it’s better to lose knowing you chose characters you like to play as instead of from reviews of a tourney website.
No one uses characters that they don’t like.