Above your leader, stage card area and deck is the character area, where any played character cards should be placed during the game
Triton Shorestalker, Slither Blade, and Mist-Cloaked Herald are just a few, with Shoreline Looter being the best unblockable creature as it'll give you card draw as well
Vampires and Faeries/Ninja/Wizard/Planeswalkers feel like they have the most room for further optimization and there ultimately might be something there, but I think they need a little something.
If Cyclonic Rift and Whelming Wave had a baby, then there would be Desynchronization
Otherwise, the aim of this deck is to grow as far as you can, amassing creatures with huge numbers of counters to the point where your opponents are overwhelmed by their sheer power
But the pleasure of a game like Hanabi (or The Crew: The Quest for Planet Nine, another game we like) comes in the collective struggle against that frustration