This decklist technically plays as 2 separate archetypes since Darklord and Yubel don't have too much synergy but what really helps bring it in and tie them together is the Despia cards which can lean into the strengths of either archetypes strategy. The main strategy for this deck is to maximize the amount of damage inflicted along with generating as much advantage possible from raw draw power and spamming the board with bodies and potential disruptions/negates.
Initially, my intended idea was incorporating a very minimal Yubel package as I just wanted to make use of Phantom of Yubel to set up a negate that could help protect our Darklord Despia plays (which is possible in order to cut down the list to 40-43 cards) but for testing purposes I went with more as the draw power from the tech cards could make up for this. I also liked the idea of spamming the board with more bodies and being able to fuse away the field with Super Polymerization or Branded Banishment into Loving Defender.
Allure of Darkness is perfect for using with the usual Despian Tragedy but also works well with banishing Yubel/Incarnate as Spirit of Yubel can summon them back from banishment. Even so, I really liked using the new tech card I had been wanting to try for a while now, that being Tokusano Shinkyojin, where this was the perfect decklist to finally test out in and benefits from how many Level 10 monsters are run.
Overall, I really enjoyed testing this fun variant as you can pivot into either archetypes strategies. Other closing thoughts are:
I really liked adding Masquerade the Blazing Dragon into the mix to put pressure on combo heavy decks and further inflict additional damage which shuts them down when life points get low enough.
NIghtmare Throne is great to start with as it either baits out negates/disruptions or sets up Phantom of Yubel negate without committing to the Darklord Despia starter plays first.
Most importantly, the Yubel strategy in general is great for also providing defensive protecting especially with Nightmare Pain on the field to help close out duels or at least survive another turn to potentially go into the Darklord Despia plays.

Replays are not all necessarily top tier highlights but just my own showcase and experience of wins using this decklist and what decks I've encountered/faced-off against during the current meta season in ranked ladder duels and events

Match 1 vs Pendulum @00:10
Match 2 vs Swordsoul @02:02
Match 3 vs Yubel Fiend Link @04:51
Match 4 vs Salamangreat @08:00
Match 5 vs Mannadium @10:38
Match 6 vs Cyber Dragon @13:21
Match 7 vs Tearlaments @15:33
Match 8 vs Stardust Synchron @17:00
Match 9 vs Blue-Eyes Stun OTK @18:42
Match 10 vs Nouvelles Suship @20:22
Match 11 vs Timelord Burn @22:06
Match 12 vs Nemleria @22:32
Match 13 vs Bricked Opponent @24:41
Decklist @26:12