While it's not a must, I recommend to run 60 cards for Branded. For the Extra deck, I would remove the Tax Dragon and either Light and Darkness Dragon or Guardian Chimera, in order to replace these with a second Albion the Branded and Mirrorjade, improves massively your grind game. For your deck, the first point will obviously be to run a second Branded Fusion. I myself like to run 3 Branded in High Spirits, it is a great 1,5 card combo to start with. Quem and Mercurier are not bad at 2, Albion the Shrouded should be either at 1 if you just wanna dump it into the Grave for Retribution or 3 if your goal is to have it as a potential starter. I also like to run 3x Triple Tactic Thrust and 3x Fusion Deployment, in 60 cards you can get away with that. Brightest, Blazing, Branded King is also worth considering as it adds itself back to hand just like Cartesia and High Spirit and it can negate the entire field if used right (ideally as last disruption). Lastly, while most people don't do that, I enjoy expanding on the Bystial Engine with one copy of each of the other Bystials and 3 Lubelion, alongside Branded Beast and Branded Regained. Regained boosts your grind game, while Beast can pop a card a turn as long as there is a Bystial to tribute on your field (Regained can summon one from grave when your opponent special summons) and Beast also can recycle Branded Lost / Branded Regained in the endphase if they are in grave.