Here's the best gusto deck I could've made, it's up to day with the recent banlist alongside a few changes since the first version of this deck I posted here.
Strategy:
The main win condition of the deck is that your opponent should have a high atk monster on their side of the field and be able to summon daigusto sphreez alongside a gusto monster and make your opponent take battle damage attacking with your low atk gusto monsters, although with this deck the main wincon is to summon your big synchro monsters and attack for game.
Your windwitch engine will make sure that your plays go through or bait opponent's negations so you can OTK your opponent, not only you can make crystal wing synchro dragon with them but also you can summon
Baroness de Fleur in the same turn with your gusto monsters thanks to
windwitch glass bell being a level 4 tuner, you can summon her with
pilica, descendant of gusto's effect from the gy.
The side deck has changed quite a lot ever since a couple of cards got released, like
Maple Maiden which is pretty easy to summon and has a deadly combo with Gozen Match , you just declare wind with maple maiden, flip gozen match and now your opponent can only summon 1 monster unless they're playing a wind deck.
The same is for secret village of spellcasters, you just summon your windwitch synchro monsters, play secret village and hope that works against the opponent.
Other main deck options:
Other side deck options:
of course if you have side deck staples like
pankratops,
red reboot, harpie feather duster, etc. you should definitely use them too!
Other cards that you can play in your extra deck:
Cards that haven't been released yet that this deck could use:
Accel Synchro Stardust Dragon
Enjoy!