I actually came to something pretty close when exploring the idea of maximizing bargain, with a few minor differences.
Unmask is really bad, just worse than FOW without the upside of being able to react on the draw or to a topdeck. This deck would rather have thoughtseize.
Chain of vapor md is totally unessecary seeing as no one is currently gunning for this deck and White eldrazi is no longer a threat in the metagame due to losing thorn.
2nd tendrils is just strictly worse than playing another copy of Petition, Having a Strong Bargain plan and a strong petition plan means that your deck will be hedged against grave hate, low life totals/pithing needle effects.
Based on the presence of Outcome and other fast combo decks in the format, a 1 of Flusterstorm can be pretty good as a versatile one mana protection spell. It also works pretty well in conjunction with defense grid to deny the opponent their one opportunity to counter a spell per turn.
Preordain is a fine card in this deck but the blue mana cost is definitely something not to be underestimated, I don't know if the second copy is better than having top in your deck
31 mana sources is too many, So i would try to trim 1-2.
LED is god awful seeing as it can force your hand into blowouts and it doesn't help you cast Y bargain, the 4thCabal ritual is still better.
The 13th land md is not necessary in a built for speed ritual deck, especially when mana denial becomes less prevalent in the meta.
Lotus petal is relatively underwhelming as well, especially when many decks bring in Stony postboard as their way to fight combo.