You can also get more benefits along the way, which offsets the fact that your creature will be gone in a few turns
For Master Duel format, I would advise something around 0.62 - 0.70, the reason being that Master Duel decks have the "N/R/SR/UR" tags on the cards, which throws off object detection to some significant extent, so you'll need to compensating by reducing the accuracy coefficient threshold
Volcarona could work really well as a Basic Pokemon, but the card isn't worth the time you're wasting to evolve it from a Larvesta
This increases both its overall damage and the chance to successfully flip that coin
"Red-Eyes Insight" fills the GY and fetches cards like "Red-Eyes Fusion" with which "Meteor Black Comet Dragon" can be summoned, further setting up the GY while dealing burn damage and even bringing back Fusion Material if it is destroyed
The card is basically all-powerful, and Yugi was only able to beat it through wild logic leaps, which included his monsters bouncing their attacks off of one another in order to power each other up