Fabled synchro spam and their card draw with Danger is absolutely deranged (Dark World might be better than them, i havent done much work with DW), put a bunch of small guys on the field for free and end with a full board of powerfull synchros.
Chawa is usually one of the better play starters of the deck, being a low level tuner that can special summon itself by discarding a Fabled card, getting you easy access to formula synchron and metal marcher, also Ragin with any other level 4
Krus revives any level 4 or lower Fabled monster from the graveyard, this includes Synchro monsters if you want to make a Unicore Turbo deck, no once per turns!
Abanc is your go-to card to send to the graveyard from the Fableds field spell, as he is one of two Fabled cards able to use their effects on the graveyard (Kushano being the other, also a good target if you already used Abanc as he unfortunately has a hard once per turn...)
Grimro is the hand fixer every deck wants, discards itself and fetches any Fabled monster from deck as long as you have another on the field, If you have Chawa/Krus on your hand, fetching the other is an instant Ragin by reviving Grimro.
Also no hard once per turns!! Use as many times as you want, great target to get back from your field spell
Catsith is my go-to option on destroying pesky floodgates/problem monsters, i use it as an one off since he cant reliably summon itself and its effect is mandatory(!!!), you could change it for a Danger! Thunderbird! but he is not as easily searchable without other Danger! cards nor able to be discarded by most Fableds effect
Bigfoot is great for summoning Chaos Angel with any of the level 2 tuners or even Noozoche, but with Chaos Ruler limited on Master Duel you might not even need it that much, still, Jackalope can help you get him on the field easier, but i much prefer Tsuchinoko over them
Now for the Synchros...
Ragin is the goat of the deck and one of the only 3 usable Fabled Synchro, keep your hand empty and always draw 2 cards, also, no hard once per turn! go nuts with De-Synchro, just watch out, Abanc and Ganashia banish themselves when summoned from the GY
Andwraith is the other usable Fabled Synchro and boy, making your opponent start the game with one less card is powerfull, remenber that its effect is activated when special summoned, so revive him on your opponents turn with the Fabled Treason (searchable from Marccosia) and get 2 cards from them, you can also fetch any monsters sent from the opponents hand to the graveyard, so Card Destruction, Dark World Dealings and Mothman help him get that effect off, nothing better than making a opponents monsters hostage or using them for a Synchro
T.G. Librarian is just one of the best Synchros ever printed, always try to go for it if you have enough fuel for more Synchro summons, this + Ragin gets you 3 cards (Also a Chaos Angel if youre desperate), bonkers
Metal Marcher is one of the best tuner synchros ive seen, reliably go to a Crystal Wing/Chaos Ruler from one of your Ragins you wont use anymore, summon at all costs
Cupid Pitch and Coral Dragon are quite the crack pitches, i was experimenting with them but got little use off them, might be good changing them for the level 9 Crystron/Another Andwraith, even a Unicore if you want some questionable negates, nobody reads cards those days anyway
Michael has a nice effect and a good mill for getting Abanc/Kushano on the graveyard, the game might have better level 7 Synchros to use tho
Did you know Trishula doesnt have a hard once per turn? De-Synchro time!
Chaos Angel also doesnt have a hard once per turn, abuse it
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All in all, this deck has many options on how to build you board, and it all depends on how stacked your hand is, so access your plans beforehand, try to have a backup plan if shit goes to the drain, and pray to Ragin your draws are good enough you will have 19 cards in your deck by the time the turn is over, good luck!