Notes & Combos
I was inspired to play this by hendu and found it relatively easy to climb with. Main locks: Ojama + Rivalry of the Warlords/Gozen Match: Toggle on and do this during their draw phase to watch your opponent struggle to summon anything. If you have all three they can only summon LIGHT beasts which is difficult.
Fire Prison + Skill drain
Cauldron of the Old Man: Even though the effect damage is your main win condition, the life gain can serve as a lock of sorts in race situations.
Card choices/non-choices: Final Countdown: Optional. It is nice having a win condition that doesn't take up a spell zone. Allows Cauldron to go permanent gain life mode for race situations.
Eldlich is a pretty unwinnable matchup. Best to concede and queue again. If you can get the Ojama lock and Prohibition appropriately, go for it.
The extra deck doesn't matter. I chose a bunch of things with graveyard effects in the rare event I face Dogmatika.
Prosperity and Extravagance clash with the cycle package (Upstart/Into the void/Card of Demise), but there might be some combination that works better.
Pot of Desires is a more interesting option. I don't like it because I found myself having to stall until my opponent decks out with some frequency. However, it is good at finding multiple pieces of the main locks of the deck.

I'd say Harpie's Feather Duster and/or Lightning Storm, better play safe. Or if by some reason you know what Deck your opponent is using, you could also call their main combo piece to mess them up, like calling Branded Fusion against Despia

I mainly name Harpie's Feather Duster. Sometimes I name a specific out that a deck has (for example Guardian Chimera for Despia and Floowandereeze and the Unexplored Wind for Floo). I did name Ash Blossom to dig for cards once (I can't say that's common).