Notes & Combos
Basically, the deck tries to take advantage of both engines to maximize decent openings and to minimize bricking. [hence no eXceeds] Normally, it's Sera + sets + Prison and pass, Sera + Ecclesia for Punishment to give us a stronger card that can go +1 and interact better with things / hit backrow with N'Tss if needed, or if you open a Traptrix + Brigandine, go for either Granite to get Prison or if your backrow seems strong enough, bring out Redoer for an extra disruption. While not ideal/common, if you open Traptrx + Ecclesia + Brigandine and your Sera gets hit with Ash, you can special Ecclesia with no effect to go into a rank 4 anyways.
Same list I used to climb from Plat 5 - Dia 5 last season.
Major worries are still floodgates. Skill Drain still sucks for everyone and Rivalry kills you since your main s/t removal [Myrm] is summoned off of plants [Dio and Sera].. while she's an insect. I do want to add Feature Duster or Heavy Storm Duster.. but s/t removal only doesn't help protect Sera boards.
Alongside that, Branded Fusion + Mirrorjade is still a huge concern. As Plat is usually more of everything, I wasn't maining Super Ancient Organism, however, if I see a ton in Dia, I'm trying that again.
Lastly.. with Quick Fix going to 2, I noticed a few SPYRAL lists and boy, is it tough to out advantage/stop their plays with their stuff not being OPT.. and if they get out Resort.. the targeting immunity really hurts. Might need to add something in if those pop up more.

This is what I faced:
Floo: 2
SPYRAL: 2
Branded/Dragonmaid: 1
Branded/Despia/Adventure: 2
Branded/Tri: 1
Branded/Despia: 2
Branded/Shaddoll/Adventure: 1
Branded/Zombie/Eldlich: 1
Branded/Cydra: 1
Pend [not Endymion]: 3
Eldlich: 2
Dragonmaid: 1
Swordsoul: 2
Dlink w/DPE: 1
Phantom Beast/Necrovalley/stun: 1
Salamangreat: 1
Guru: 1
Adventure/Tri/Zoo: 1
Ig/Infer-Knight w/DPE: 1

Here is the list of what I lost against:
Branded/Despia/Adventure. I went first, however, they opened Alabz, I tried to Compuls, and then they chained Super Poly and it went downhill from there.
Branded/Shaddoll/Adventure. They went first and got out Schism + Mirrorjade in a 60 card deck. Turn 1 Winda + Mirrorjade is fun.
Eldlich. I went first, however, they opened Duster + Rivalry.
Eldlich. I went first, however, they opened Duster + Skill Drain.
SPYRAL. I went first, however, I opened Ecc + Fleur + Punishment when I only had 1 Punishment in the deck and they opened Resort and popped off. [also couldn't draw a Traptrix with them locking my draws]
Guru. I went first, however, they opened 2 Hidden City + Metaverse + Prison + Rivalry. Used Judgment on the first Hidden City just to be hit by a second. Then used Strike on the Guru they got off the second.. yet, they still had the lockdown thanks to Metaverse into a 3rd Hidden City next turn + Rivalry.

I'll give your deck a shot by adding Dimensional Barrier, thanks! I think it might solve Branded Despia problem and still would be useful against certain decks like Swordsoul.

Honestly, I'm not sure how great it is against Branded with Dimensional Barrier, as you don't normally OTK on the snapback and it depends on you going first to stop them [unless if they don't have any plays going first somehow] It is nice though if you hit Branded Fusion and they can't send anything to get going [ie Tragedy] and it just ends their turn.
Although, if you have success with it, more the power to you. Logically, besides XYZ decks, it feels like Super Ancient should hit everything to at least stall things out, even if it doesn't stop Tragedy/anything else being sent from Branded Fusion. It would stop them from going into Mirrorjade though if they didn't have an ED monster out already though.