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.
Card Set(s) -Yamato-[ST-09] CARD VIEW ST09-013 | C | CHARACTER Yamato Attribute Special Block icon 1 Card Set(s) -Yamato-[ST-09] CARD VIEW ST09-014 | C | EVENT Narikabura Arrow Block icon 1 Effect [Counter] If you have 2 or less Life cards, give up to 1 of your opponent's Leader or Character cards 3000 power during this turn
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
Maybe another time
If Cyclonic Rift and Whelming Wave had a baby, then there would be Desynchronization
Above your leader, stage card area and deck is the character area, where any played character cards should be placed during the game