>>527139795
The RDA deck is probably better but you're playing a lot of random shit, it could be cleaned up a lot.
You can ONLY summon Dark Dragon Synchros from the Extra Deck so lose everything that isn't one. And a lot of the non-archetype stuff in the main deck can go too, you generally don't want random cards in your deck if they're not gonna help your combo or are searchable by your combo.

I threw this one together with no additional URs. The new cards are
>Droll & Lock Bird
>Skull Meister
>Obsessive Uvualoop
>Zalamander Catalyzer
>Void Apocalypse
>Book of Moon
>Fiendish Golem
>Red Zone
If you're low on SR dust you could replace those SRs with Forbidden Chalice, Mystical Space Typhoon, Lost Wind, a Crimson Powerforce maybe. idk anything cheap really