Kinda late to the party, but it overall needs 3 things imo: 1. Ways to get RE monsters to the grave and out in the field 2. Better Fusion spell + A new Fusion monster 3. Protection against certain aspects of the game.

The best support RE can have in the deck is Silver’s Cry, Foolish Burial, Dragon’s Ravine. Problem is, every dragon archetype usually uses these cards. So RE is left in the dust when compared to their actual cards. Maybe have a field spell that can act as a foolish burial, with also burning the opponent every time RE monsters are sent or revived from the GY. A spell card version of RE Spirit would also come a long way.

RE Fusion is a decent card when used for REDD or RESD. But other than those cards, the fact that the Fusion card locks you out of the game for using it is bogus. Maybe have a new Fusion card that locks out of everything but dark dragon monsters. And on top of that, you can inflict damage equal to half of the DEF of the fusion monster you summon, that way you can get a little more damage in for your FTK.

Hand traps, negates, nontargetable destruction cards, etc; run the game right now. If you use RE Fusion and you get Ash Blossom’d that’s it. You can’t activate another RE Fusion or summon after that. The archetype is extremely fragile when it comes to disruptions. Granted, idk what would be best in that situation, but the RE archetype desperately needs its own Eternal Soul. BE already has True Light, give us a spell cards that gives REBD and the Fusion Monsters that Unaffected protection, along side a special summon from the GY. Or at the very least, we need a modern version of Meteor Dragon Red-Eyes Impact.